Open Quantum Frontier Institute Workshop
Introduction
We are pleased to invite you to the 1st Workshop of the Open Quantum Frontier Institute, which will take place at the Colorado School of Mines in Golden, CO on February 2122, 2020. The purpose of the workshop is to advance quantum information research in noisy and open quantum systems and build quantum engineering education programs throughout the U.S. Our twoday workshop will feature:
 Invited talks given by professors, postdocs, and senior researchers
 Posters presented by postdocs, graduate, and undergraduate students
 Poster award
 Student travel support (TBD)
 Catered lunch and coffee breaks
For more information, please contact quantum@mines.edu.
Registration Information
Our workshop is open for broad participation and can support up to 180 attendees.
Online registration closed on February 19, 2020. You may still be able to register. Please contact us at quantum@mines.edu.
Conference Location
Friday 2/21 and Saturday 2/22, Green Center Metals Hall, Colorado School of Mines
Schedule
Date, Time  Activity 

Friday 2/21  
08:0009:00 AM  Registration, Breakfast, Coffee 
09:0009:15 AM  Lincoln Carr Welcoming Remarks 
Oral Session I Quantum Simulations Mina Fasihi, Chair 

25 min talk, 5 minutes for questions  
09:1509:45 AM  Hilary Hurst, Joint Quantum Institute/San Jose State UniversityQuantum Control with Spinor BoseEinstein CondensatesUnderstanding and controlling manybody quantum systems in noisy environments is paramount to developing robust quantum technologies. An external environment can be thought of as a measurement reservoir which extracts information about the quantum system. Cold atoms are well suited to examine systemenvironment interaction via weak (i.e. minimally destructive) measurement techniques, wherein the measurement probe acts as the environment and also provides a noisy record of system dynamics. The measurement record can then be used in a feedback scheme, opening the door to real time control of quantum gases. In this talk I discuss our theoretical proposal to use weak measurement and feedback to engineer new phases in spin1/2 BoseEinstein condensates. We show that measurement and feedback alters the effective Hamiltonian governing system dynamics, thereby driving phase transitions reminiscent of a quantum quench for the closed system. We also develop a feedback cooling protocol which prevents runaway heating of the condensate due to measurement backaction. Our results show that measurement and feedback can alter condensate dynamics in a stable, controllable manner and provides a route toward Hamiltonian engineering in manybody systems. Finally, I will discuss ongoing experimental work to realize our proposal using Rb87.
Speaker Bio: Hilary Hurst received her BS in Engineering Physics from the Colorado School of Mines. She went on to earn a Masters in Theoretical Physics at the University of Cambridge and received her PhD in physics from the University of Maryland. She is currently an NRC Postdoctoral Fellow at NIST and the Joint Quantum Institute and will be joining the faculty at San Jose State University in the Fall. Her areas of research include quantum measurement and feedback control for manybody systems and magnetization dynamics in dissipative systems. 
09:4510:15 AM  Richard T. Scalettar, University of California DavisQuantum Simulation Studies of Charge Patterns in FermiBose SystemsThe Holstein Model describes the interaction between fermions and a collection of local (dispersionless) phonon modes, and has intimate connections to the attractive Hubbard Hamiltonian. In the dilute limit, the phonon degrees of freedom dress the fermions, giving rise to polaron and bipolaron formation. At higher densities, the phonons mediate collective superconducting (SC) and charge density wave (CDW) phases. I will review the basic physics of the Holstein model and show results of some recent Quantum Monte Carlo (QMC) simulations where we have determined the quantum critical point and finite temperature transition points of the Holstein model on a honeycomb lattice, and also on the role of phonon dispersion on SC and CDW order. I will conclude the presentation by discussing a new, Langevinbased, algorithm which might allow connections to cold atom quantum simulators of BoseFermi mixtures.
Speaker Bio: Richard Scalettar received his PhD in physics in 1986 from the University of California, Santa Barbara. In 1989, after a postdoc in the Chemistry Department at the University of Illinois, UrbanaChampaign, he joined the Physics faculty at the University of California, Davis. Prof. Scalettar's research is in the application of Quantum Monte Carlo methods to problems in quantum magnetism, superconductivity, and localization. He was elected Fellow of the American Physical Society in 2004, and served as chair of the APS Division of Computational Physics in 2010. In 2009, he received the Chancellor's Outstanding Undergraduate Mentor Award at UC Davis, and in 2014 was named as an outstanding referee of the American Physical Society. 
10:1510:30 AM  Coffee and Snacks 
Oral Session II Quantum Computing 1 Matthew Jones, Chair 

10:3011:00 AM  Zhexuan Gong, Colorado School of MinesSpeed limit of entangling gates in quantum computers: Theory and Experiment.Fast twoqubit entangling gates are essential for quantum computers with finite coherence times. Due to the limit of interaction strength among qubits, there exists a theoretical speed limit for a given twoqubit entangling gate. This speed limit has been explicitly found only for a twoqubit system and under the assumption of negligible single qubit gate time. We propose to demonstrate such speed limit experimentally using two superconducting transmon qubits with an alwayson capacitive coupling. Moreover, we investigate a modified speed limit when single qubit gate time is not negligible, as in any practical experimental setup. Finally, we study the generalization to multiple qubit systems where the coupling to additional qubits can significantly increase the speed limit of a twoqubit entangling gate, thus requiring the codesign of the quantum computer from both theorists and experimentalists for optimal gate performance.
Speaker Bio: Zhexuan Gong received his PhD in Physics from the University of Michigan in 2013. He was then a postdoctoral research associate and research scientist at the Joint Quantum Institute, University of Maryland and NIST. He joined Mines in 2018 as an assistant professor and also holds a NIST associate position. His areas of research include quantum computing, quantum information theory, and quantum manybody physics. 
11:0011:30 AM  Xiao Mi, GoogleQuantum supremacy using a programmable superconducting processorThe promise of quantum computers is that certain computational tasks might be executed exponentially faster on a quantum processor than on a classical processor. A fundamental challenge is to build a highfidelity processor capable of running quantum algorithms in an exponentially large computational space. Here we report the use of a processor with programmable superconducting qubits to create quantum states on 53 qubits, corresponding to a computational statespace of dimension 2^{53} (about 10^{16}). Measurements from repeated experiments sample the resulting probability distribution, which we verify using classical simulations. Our Sycamore processor takes about 200 seconds to sample one instance of a quantum circuit a million timesour benchmarks currently indicate that the equivalent task for a stateoftheart classical supercomputer would take approximately 10,000 years. This dramatic increase in speed compared to all known classical algorithms is an experimental realization of quantum supremacy for this specific computational task, heralding a muchanticipated computing paradigm.
Speaker Bio: Xiao is an experimental physicst at Google working on quantum gate metrology and applications of nearterm quantum processors to condensed matter physics problems. Prior to joing Google, Xiao pioneered the integration of circuit quantum electrodynamics with semiconductor spin qubits during his PhD at Princeton. He is the recipient of the 2020 Richard Greene Condensed Matter Thesis Prize from the American Physical Society. 
Oral Session III Open Quantum Systems Tyjal DewolfMoura, Chair 

11:3012:00 PM  Eliot Kapit, Colorado School of MinesNoisetolerant quantum speedups in quantum annealing without fine tuningQuantum annealing is a powerful alternative model for quantum computing, which can succeed in the presence of environmental noise even without error correction. However, despite great effort, no conclusive proof of a quantum speedup (relative to state of the art classical algorithms) has been shown for these systems, and rigorous theoretical proofs of a quantum advantage generally rely on exponential precision in at least some aspects of the system, an unphysical resource guaranteed to be scrambled by random noise. In this work, we propose a new variant of quantum annealing, called RFQA, which can maintain a scalable quantum speedup in the face of noise and modest control precision. Specifically, we consider a modification of flux qubitbased quantum annealing which includes random, but coherent, lowfrequency oscillations in the directions of the transverse field terms as the system evolves. We show that this method produces a quantum speedup for finding ground states in the Grover problem and quantum random energy model, and thus should be widely applicable to other hard optimization problems which can be formulated as quantum spin glasses. Further, we show that this speedup should be resilient to two realistic noise channels (1⁄_{f}like local potential fluctuations and local heating from interaction with a finite temperature bath), and that another noise channel, bathassisted quantum phase transitions, actually accelerates the algorithm and may outweigh the negative effects of the others. The modifications we consider have a straightforward experimental implementation and could be explored with current technology.
Speaker Bio: Eliot Kapit receieved his PhD from Cornell in 2012. From there, he did postdocs at Oxford and the City University of New York, before starting as an Assistant Professor of Physics at Tulane University from 20152018. In summer 2018, he joined the faculty of Colorado School of Mines. His research focuses on quantum information, manybody physics, and novel superconducting circuits. 
12:0012:30 PM  Timur Tscherbul, University of Nevada RenoQuantum coherence from thermal noise: From coherent dynamics to nonequilibrium steady statesQuantum coherence is widely regarded as an essential resource for quantum information processing and quantum sensing. In this talk, I will present an overview of our recent work on the quantum dynamics of noiseinduced Fano coherences that occur in multilevel quantum systems interacting with a thermal bath (such as blackbody radiation) in the absence of coherent driving. By solving the nonsecular BlochRedfield quantum master equation for a model threelevel Vsystem driven by a thermal bath, we show that Fano coherences exhibit quantum beats when the spacing between the excited states of the Vsystem is large compared to the radiative decay rates. In the opposite limit of small excitedstate spacing, we observe the emergence of nonequilibrium quasisteady states, which become true nonequilibrium steady states if the thermal driving is polarized. The general theory will be illustrated with two examples involving the time evolution of Fano coherences in Rydberg atoms immersed in blackbody radiation and the breaking of detailed balance in atomic calcium driven by polarized incoherent light. Implications of these results for quantum information processing and quantum thermodynamics will be discussed.
Speaker Bio: Tscherbul Timur earned his PhD from Moscow State University, and received a Killam postdoctoral fellowship at the University of British Columbia. He joined the faculty at the University of Nevada, Reno in 2015 after working as a postdoc at Harvard and the University of Toronto. He is a computational quantum physisist interested in the theory of open quantum systems, quantum dynamics and control of complex atomic and molecular systems, quantum impurity problems, and diagrammatic Monte Carlo methods. 
12:3001:30 PM  Catered Lunch 
Oral Session IV Quantum Computing 2 Kirsten Blagg, Chair 

01:3002:00 PM  Justin Johnson, National Renewable Energy LabMolecular approaches to robust qubits: theory, structures, and spectroscopyThe versatility of chemical substitution provides nearly infinite space for controlling energy levels and electronic/spin population flow in conjugated organic molecules, and as such, excitedstate molecular systems may lend themselves robust qubits with unique properties. We have chosen to investigate the spin states of triplet exciton pairs that are generated quickly upon photoexcitation of tailored molecules and appear to be protected from decoherence even at room temperature until decay to the ground state on a microsecond timescale. Strong spin polarization seems inherent in some of these systems, as detected through the distinct pattern of microwave absorption in a static magnetic field (i.e., EPR spectra). Furthermore, some molecules produce photon emission that is dependent on the exact spin state, much like nitrogen vacancy in diamond systems where magnetic resonance is detected optically. We are a building a library of molecules that can be coupled to each other with tunable strengths and geometries in order to understand the fundamental properties of spinentangled triplet pairs, and more incisively to evaluate whether or not there might be inherent advantages of this approach, especially in terms of sensitivity to noise, compared with more conventional open quantum systems. This is an early stage and focused effort, but we hope to make connections to other work to uncover synergies or extensions of our ideas and capabilities that impact QIS more broadly.
Speaker Bio: Justin Johnson has been a senior scientist at the National Renewable Energy Laboratory (NREL) since 2008 and is also a joint appointee in Chemistry at Colorado School of Mines. He received his Ph.D. in Chemistry from the University of California, Berkeley, in 2004 and subsequently did postdoctoral work with Dr. Arthur Nozik at NREL and Prof. Josef Michl at the University of Colorado, Boulder. His technical expertise is in ultrafast and nonlinear spectroscopy, and his research interests include investigating the dynamics of photophysical phenomena associated with solar light harvesting, energy storage, and quantum information in both molecular and nanoscale semiconductor systems. 
02:0002:30 PM  Raymond Simmonds, National Institute of Standards and TechnologyManipulating mechanical and electrical quanta with parametric circuitsParametric processes are ubiquitous in nature.
At their heart is an interaction that involves a nonlinear relationship between changing quantities. These processes can lead to energy transport in different forms. One form produces amplification, like the well known example of a child on a swing who periodically changes her center of gravity causing the resonance frequency of the swing to be modulated, inducing more swinging. Here, energy from her pumping legs at one frequency is absorbed and transferred into more motion at a different swinging frequency. This type of phenomenon can be mechanical (as with a swing) or electrical in nature, lending itself to many useful technological applications.
Parametric processes are paramount for new emerging quantum information technologies like lasercooled trapped ions, linear quantum optics, or optomechanics. Analogous physical systems can be created on a single chip using superconducting circuits, along with nonlinear Josephson junctions, or metalized flexible membrane capacitors. In this talk, I will discuss our experimental efforts at NIST to utilize parametric interactions to help control different physical processes that are important manipulating quantum information. Harnessing these processes onchip with superconducting circuit components, including microdrum mechanical resonators, electromagnetic cavity modes, and superconducting quantum bits provides a highly programmable platform for engineering both closed and open quantum systems for simulation or computation.
Speaker Bio: Ray Simmonds received his BA, MA, and PhD from the University of California, Berkeley in 2002, where he studied Quantum Interfrence in superfluid He3. After a 2 year postdoc at NIST in Boulder CO developing superconducting quantum bits, he became a staff physicist. His current research is focused on the application of superconducting microwave and optomechanical circuit techniques for quantum information, measurement, and computing. 
02:3003:00 PM  Coffee and Cookies 
03:0006:00 PM  Open Quantum Frontier Institute Strategy Meeting and Breakout Sessions 
Saturday 2/22  
08:0009:00 AM  Breakfast, Coffee 
08:50 AM  Opening Remarks 
Oral Session V Materials for Quantum Information Science Edwin Supple, Chair 

09:0009:30 AM  TzuMing Lu, Sandia National LabHole spins in Ge/GeSi heterostructuresThere is growing interest in leveraging the unique properties of holecarrier systems and their intrinsically strong spinorbit coupling to engineer novel qubits. For example, qubit controls using electric dipole spin resonance have recently been demonstrated in Ge/GeSi hole quantum dots. In this talk, we will present unique physical properties of holes in Ge/GeSi heterostructures as well as our ongoing efforts toward hole spin qubits, including development of gated device architectures, charge sensing, and magnetospectroscopy in the fewhole regime. We will also present our theoretical understanding and modeling of electric dipole spin resonance of holes in Ge quantum dots through intrinsic spinorbit coupling. An effective twolevel Hamiltonian for the spin of an individual hole is derived from the strain of the heterostructure and electrostatic potential, allowing for predictions on how the spin will respond to applied AC fields.
Acknowledgements:
This work was funded, in part, by the Laboratory Directed Research and Development Program and performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the US Department of Energy's National Nuclear Security Administration under contract DENA0003525. The views expressed in this article do not necessarily represent the views of the US Department of Energy or the United States Government. The work at NTU was supported by the Ministry of Science and Technology (10726228002018).
Speaker Bio: TzuMing Lu received his B.S. from National Taiwan University in 2004 and Ph.D. from Princeton University in 2011. After graduate school, he was a postdoctoral researcher at Sandia National Laboratories, New Mexico, where he is currently a Senior Member of Technical Staff. His research topics include semiconductor device physics, spinorbit coupling in solidstate systems, and quantum behavior of nanoscale structures. He is also a Center for Integrated Nanotechnologies (CINT) scientist, supporting user projects on quantum information science and solidstate physics at the nanoscale. 
09:3010:00 AM  Rupert Lewis, Sandia National LabReversible Superconducting Logic for Low Power ComputationReversible computing is the ultimate low energy computing technology. To be reversible, a computational operation must not only be able to run forward or backward but must preserve the energy of a bit. In practice, performing logic operations at or below the Landauer limit of kBT ln2 per logical operation is the goal of the field.
Superconducting circuits are the perfect technology for implementing ballistic reversible circuits due to inherently low losses and the use of single flux quanta as robust bits. I will discuss our progress towards an asynchronous ballistic reversible logic based on fluxons propagating along superconducting lines and incorporating Josephson junctions as active elements.
While superconducting logic families have the longterm potential of transforming high performance computing such as data centers, in the near term, the greatest impact is likely to be on quantum computers where the low energy dissipation (relative to transistorized logic) will enable in cryostat control of quantum computers. Funding Statement: Supported by the LDRD program at SNL, a multimission laboratory managed and operated by NTESS, LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. DOEs NNSA under contract DENA0003525.
Speaker Bio: Rupert Lewis received his PhD from Indiana University in 2001. He completed postdocs at the National High Magnetic Field Lab (in Tallahassee) and at the the University of Maryland where he worked on such diverse subjects as Wigner crystalization of 2D electron systems and superconducting implementations of quantum computing. Recently, he's branched out into reversible computing. He's been a staff member at Sandia since 2013. 
10:0010:30 AM  Corey Rae McRea, National Institute of Standards and TechnologyThe Boulder Cryogenic Quantum TestbedThe investigation of materials losses at low powers and temperatures has been identified as critical for increasing performance and scalability of superconducting quantum computers. This investigation requires the dissemination of a community standard for the accurate and repeatable measurement and analysis of superconducting microwave resonators. JILA / CU’s Boulder Cryogenic Quantum Testbed (CQT) is a nonprofit, precompetitive research facility for developing and openly disseminating standard protocols to reproducibly measure the quality factor and performance characteristics of superconducting microwave resonators used in quantum computing circuits. The testbed was founded on a philosophy of open collaborative science by a joint initiative between government, academic, and industry partners.
Speaker Bio: Corey Rae McRae received her PhD in Quantum Information from the University of Waterloo in 2018. She is now a postdoctoral researcher at the National Institute of Standards and Technology Boulder, as well as the director of the Boulder Cryogenic Quantum Testbed at JILA, University of Colorado Boulder. She studies materials losses in superconducting quantum circuits as well as the behavior and performance of superconducting microwave resonators. 
10:3011:00 AM  Coffee and Snacks 
Oral Session VI Quantum Measurement and Sensing Joel Howard, Chair 

11:0011:30 AM  Kater Murch, Washington UniversitySuperconducting quantum circuits: exploring frontiers of quantum measurement and dissipation at microwave frequenciesJosephson junction based quantum circuits have enabled broad exploration into open quantum systems in the microwave frequency domain. The combination of coherent quantum bits, robust single qubit control, and quantum noise limited parametric amplifiers has yielded an unprecedented view into the physics of quantum measurement and quantum dissipation. I will survey a range of research topics that are currently open to experimental exploration with this platform, including weak measurement and quantum trajectories, nonMarkovian dynamics, effective nonHermitian dynamics, quantum thermodynamics, and quantum sensing.
Speaker Bio: Kater Murch received his PhD in physics in 2008 from the University of California, Berkeley, with disseration research focusing on cold atom cavity QED and measurement backaction. His postdoctoral work at UC Berkeley focused on superconducting quantum circuits and quantum measurement. Since 2014, he has been at Washington University in St. Louis with work focusing on open quantum systems experiment with superconducting circuits. Kater has received an Alfred P. Sloan fellowship, an NSF CAREER award, and a Cottrell Scholar award. 
11:3012:00 PM  Pauli Kehayias, Sandia National LabMagnetic sensing using nitrogenvacancy centers in diamondNitrogenvacancy (NV) centers in diamond have gained much recent interest for their uses in magnetic sensing and quantum information. NV centers are fluorescent defect centers that have discrete electronic states with fewmillisecond lifetimes, can be optically initialized and read out, are magnetically sensitive, and work in ambient conditions or extreme environments. Furthermore, our ability to place NV centers near the diamond surface (as close as a few nanometers) enables us to have a small separation between the NVs and external magnetic field sources, allowing us to sense external sources with high spatial resolution and sensitivity. After introducing NV DC and AC magnetometry techniques, I will present some ongoing NV magnetic sensing applications, including smallvolume NMR spectroscopy, magnetometry and pressure sensing in a diamond anvil cell, and magnetic microscopy for geology, biology, and condensedmatter physics.
Speaker Bio: Pauli did his PhD work at UC Berkeley, after which he was a postdoc at Harvard. Currently he is a Truman Fellowship postdoc at Sandia National Labs. He works on magnetic sensing and imaging with nitrogenvacancy centers in diamond, with applications in NMR spectroscopy, paleomagnetism, biomagnetism, and magnetic materials. 
12:0001:00 PM  Catered Lunch and Breakout Session 
Oral Session VII Quantum Education Casey Jameson, Chair 

25 min talk, 5 minutes for questions  
01:0001:30 PM  Mark Beck, Reed CollegeExploring Fundamentals of Quantum Mechanics with OpticsIndividual photons and entangledphoton pairs are excellent resources for exploring fundamental questions in quantum mechanics. We, and others, have developed a number of teaching laboratories that use these resources to do precisely that. The experiments include: "Proving" that light consists of photons, singlephoton interference, and tests of local realism. I will describe some of these experiments, as well as the physics behind them. I will also describe our recent work on experiments that involve more than two photons.
Speaker Bio: Mark Beck received his BS and PhD degrees in Optics from the University of Rochester. He was a postdoctoral researcher at the University of Oregon, and has taught physics at Reed College and Whitman College since 1994. His areas of research specialization are quantum optics and quantum measurement. In 2018 he was the recipient of the Richtmyer Memorial Lecture Award from the American Association of Physics Teachers. 
01:3002:00 PM  Theresa Lynn, Harvey Mudd CollegeQuantum Secrets: Protecting Them in the Laboratory, Unraveling Them in the ClassroomI report on aspects of quantum education at Harvey Mudd beyond the quantum mechanics course sequence for physics majors. In upperlevel physics labs, for example, entangled photon experiments allow direct experimental investigation of phenomena central to quantum information, while NMR experiments give students valuable exposure to working with pulse sequences and the language of coherence times. In introductory courses, principles of quantum mechanics have been presented in the contexts of quantum optics and of materials science at both the firstsemester and sophomore levels. And outside the major, our undergraduate quantum information course relies on linear algebra but minimal background in physics, and regularly enrolls the majority of its students from outside the physics major (chiefly computer science and math majors). Time permitting, I will supplement this overview of quantum education at Harvey Mudd with some recent undergraduate research in my quantum optics group, where our work focuses on nonideal situations involving entanglement. In one project, we measure photon pairs partially entangled in polarization to show that certain partially entangled states have a surprising oneway feature in the way that measurements on one particle nonclassically alter the measurement statistics of the second (EPR steering). In another project, we have established several limits on how well nonentangling measurements can perform generalized Bell measurements on entangled states more complex than the twoqubit case; these limits are relevant to recent and nearterm experimental realizations of quantum teleportation and dense coding protocols.
Speaker Bio: Theresa Lynn received her B.A. in physics from Harvard and did her Ph.D. at Caltech doing experimental quantum optics and atomic physics. After working as a postdoc and staff scientist at Caltech in educational outreach and nuclear astrophysics, Theresa returned to AMO physics when she took a faculty position at Harvey Mudd College, where she has been since 2006. Her current research areas are quantum optics and fundamentals of quantum mechanics. Since 2014 she has taught an introductory quantum information course to an audience of physics and other STEM majors. 
02:0004:00 PM  Poster Session with Coffee and CookiesKirsten Blagg Colorado School of Mines Thermoelectric Effects in Superconductor Ferromagnetic Hybrids Jacob CutshallReed College A New Form of Quantum Tomography Mina FasihiColorado School of Mines Complex Network Description of Phase Transitions in the Classical and Quantum Disordered Ising Model Patrick Harrington Washington University St. Louis Photonic Transport in Quantum Metamaterials Joel Howard Colorado School of Mines Investigating Entanglement Rates of Coupled Superconducting Qubits Eric Jones Colorado School of Mines Variational Preparation of Quantum Hall States on a Lattice Matthew Jones Colorado School of Mines Open Source Matrix Product States: A Simulation Platform for Quantum Computing Technologies Daria Kowsari Washington University St. Louis Memory in NonMarkovian Open Quantum Systems Suyesh Koyu University of Nevada Reno Quantum Coherent Dynamics from Thermal Noise: A Threelevel Vsystem Driven by Incoherent Radiation Joshua Lewis Colorado School of Mines Use of Fractional Calculus in the Analysis of Quantum Systems Alex Lidiak Colorado School of Mines Quantum State Compression and Analysis via Dimensionality Reduction Bradley Lloyd Colorado School of Mines Quantum Dots in Silicon as a Candidate Platform for Scalable Quantum Computing and Quantum Neuromorphic Devices Nick Materise Colorado School of Mines Quantum Heat Engine Simulated on Superconducting Qubits David Rodriguez Perez Colorado School of Mines Variable Dissipation in Small Logical Qubits Zhijie Tang Colorado School of Mines Theoretical Survey of Unconventional Quantum Annealing Methods Applied to a Difficult Trial Problem Brooks Venuti Colorado School of Mines Probing Magnetic Skyrmions in the Presence of Disorder 
04:0004:30 PM  Poster Awards, Final Remarks. Workshop ends for most participants 
04:3005:00 PM  Breakout Session Summaries: Recommendations for QLCI Proposal 
05:0006:00 PM  Open Quantum Frontier Institute Strategy Closed Meeting 
Invited Speakers
Speaker/Inst/Abstract/Bio 

Mark Beck, Reed CollegeExploring Fundamentals of Quantum Mechanics with OpticsIndividual photons and entangledphoton pairs are excellent resources for exploring fundamental questions in quantum mechanics. We, and others, have developed a number of teaching laboratories that use these resources to do precisely that. The experiments include: "Proving" that light consists of photons, singlephoton interference, and tests of local realism. I will describe some of these experiments, as well as the physics behind them. I will also describe our recent work on experiments that involve more than two photons.
Speaker Bio: Mark Beck received his BS and PhD degrees in Optics from the University of Rochester. He was a postdoctoral researcher at the University of Oregon, and has taught physics at Reed College and Whitman College since 1994. His areas of research specialization are quantum optics and quantum measurement. In 2018 he was the recipient of the Richtmyer Memorial Lecture Award from the American Association of Physics Teachers. 
Hilary Hurst, Joint Quantum Institute/San Jose State UniversityQuantum Control with Spinor BoseEinstein CondensatesQuantum Control with Spinor BoseEinstein Condensates
Understanding and controlling manybody quantum systems in noisy environments is paramount to developing robust quantum technologies. An external environment can be thought of as a measurement reservoir which extracts information about the quantum system. Cold atoms are well suited to examine systemenvironment interaction via weak (i.e. minimally destructive) measurement techniques, wherein the measurement probe acts as the environment and also provides a noisy record of system dynamics. The measurement record can then be used in a feedback scheme, opening the door to real time control of quantum gases. In this talk I discuss our theoretical proposal to use weak measurement and feedback to engineer new phases in spin1/2 BoseEinstein condensates. We show that measurement and feedback alters the effective Hamiltonian governing system dynamics, thereby driving phase transitions reminiscent of a quantum quench for the closed system. We also develop a feedback cooling protocol which prevents runaway heating of the condensate due to measurement backaction. Our results show that measurement and feedback can alter condensate dynamics in a stable, controllable manner and provides a route toward Hamiltonian engineering in manybody systems. Finally, I will discuss ongoing experimental work to realize our proposal using Rb87. Speaker Bio: Hilary Hurst received her BS in Engineering Physics from the Colorado School of Mines. She went on to earn a Masters in Theoretical Physics at the University of Cambridge and received her PhD in physics from the University of Maryland. She is currently an NRC Postdoctoral Fellow at NIST and the Joint Quantum Institute and will be joining the faculty at San Jose State University in the Fall. Her areas of research include quantum measurement and feedback control for manybody systems and magnetization dynamics in dissipative systems. 
Justin Johnson, National Renewable Energy LabMolecular approaches to robust qubits: theory, structures, and spectroscopyThe versatility of chemical substitution provides nearly infinite space for controlling energy levels and electronic/spin population flow in conjugated organic molecules, and as such, excitedstate molecular systems may lend themselves robust qubits with unique properties. We have chosen to investigate the spin states of triplet exciton pairs that are generated quickly upon photoexcitation of tailored molecules and appear to be protected from decoherence even at room temperature until decay to the ground state on a microsecond timescale. Strong spin polarization seems inherent in some of these systems, as detected through the distinct pattern of microwave absorption in a static magnetic field (i.e., EPR spectra). Furthermore, some molecules produce photon emission that is dependent on the exact spin state, much like nitrogen vacancy in diamond systems where magnetic resonance is detected optically. We are a building a library of molecules that can be coupled to each other with tunable strengths and geometries in order to understand the fundamental properties of spinentangled triplet pairs, and more incisively to evaluate whether or not there might be inherent advantages of this approach, especially in terms of sensitivity to noise, compared with more conventional open quantum systems. This is an early stage and focused effort, but we hope to make connections to other work to uncover synergies or extensions of our ideas and capabilities that impact QIS more broadly.
Speaker Bio: Justin Johnson has been a senior scientist at the National Renewable Energy Laboratory (NREL) since 2008 and is also a joint appointee in Chemistry at Colorado School of Mines. He received his Ph.D. in Chemistry from the University of California, Berkeley, in 2004 and subsequently did postdoctoral work with Dr. Arthur Nozik at NREL and Prof. Josef Michl at the University of Colorado, Boulder. His technical expertise is in ultrafast and nonlinear spectroscopy, and his research interests include investigating the dynamics of photophysical phenomena associated with solar light harvesting, energy storage, and quantum information in both molecular and nanoscale semiconductor systems. 
Eliot Kapit, Colorado School of MinesNoisetolerant quantum speedups in quantum annealing without fine tuningQuantum annealing is a powerful alternative model for quantum computing, which can succeed in the presence of environmental noise even without error correction. However, despite great effort, no conclusive proof of a quantum speedup (relative to state of the art classical algorithms) has been shown for these systems, and rigorous theoretical proofs of a quantum advantage generally rely on exponential precision in at least some aspects of the system, an unphysical resource guaranteed to be scrambled by random noise. In this work, we propose a new variant of quantum annealing, called RFQA, which can maintain a scalable quantum speedup in the face of noise and modest control precision. Specifically, we consider a modification of flux qubitbased quantum annealing which includes random, but coherent, lowfrequency oscillations in the directions of the transverse field terms as the system evolves. We show that this method produces a quantum speedup for finding ground states in the Grover problem and quantum random energy model, and thus should be widely applicable to other hard optimization problems which can be formulated as quantum spin glasses. Further, we show that this speedup should be resilient to two realistic noise channels (1⁄_{f}like local potential fluctuations and local heating from interaction with a finite temperature bath), and that another noise channel, bathassisted quantum phase transitions, actually accelerates the algorithm and may outweigh the negative effects of the others. The modifications we consider have a straightforward experimental implementation and could be explored with current technology.
Speaker Bio: Eliot Kapit receieved his PhD from Cornell in 2012. From there, he did postdocs at Oxford and the City University of New York, before starting as an Assistant Professor of Physics at Tulane University from 20152018. In summer 2018, he joined the faculty of Colorado School of Mines. His research focuses on quantum information, manybody physics, and novel superconducting circuits. 
Pauli Kehayias, Sandia National LabMagnetic sensing using nitrogenvacancy centers in diamondNitrogenvacancy (NV) centers in diamond have gained much recent interest for their uses in magnetic sensing and quantum information. NV centers are fluorescent defect centers that have discrete electronic states with fewmillisecond lifetimes, can be optically initialized and read out, are magnetically sensitive, and work in ambient conditions or extreme environments. Furthermore, our ability to place NV centers near the diamond surface (as close as a few nanometers) enables us to have a small separation between the NVs and external magnetic field sources, allowing us to sense external sources with high spatial resolution and sensitivity. After introducing NV DC and AC magnetometry techniques, I will present some ongoing NV magnetic sensing applications, including smallvolume NMR spectroscopy, magnetometry and pressure sensing in a diamond anvil cell, and magnetic microscopy for geology, biology, and condensedmatter physics.
Speaker Bio: Pauli did his PhD work at UC Berkeley, after which he was a postdoc at Harvard. Currently he is a Truman Fellowship postdoc at Sandia National Labs. He works on magnetic sensing and imaging with nitrogenvacancy centers in diamond, with applications in NMR spectroscopy, paleomagnetism, biomagnetism, and magnetic materials. 
Rupert Lewis, Sandia National LabReversible Superconducting Logic for Low Power ComputationReversible computing is the ultimate low energy computing technology. To be reversible, a computational operation must not only be able to run forward or backward but must preserve the energy of a bit. In practice, performing logic operations at or below the Landauer limit of kBT ln2 per logical operation is the goal of the field.
Superconducting circuits are the perfect technology for implementing ballistic reversible circuits due to inherently low losses and the use of single flux quanta as robust bits. I will discuss our progress towards an asynchronous ballistic reversible logic based on fluxons propagating along superconducting lines and incorporating Josephson junctions as active elements.
While superconducting logic families have the longterm potential of transforming high performance computing such as data centers, in the near term, the greatest impact is likely to be on quantum computers where the low energy dissipation (relative to transistorized logic) will enable in cryostat control of quantum computers. Funding Statement: Supported by the LDRD program at SNL, a multimission laboratory managed and operated by NTESS, LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. DOEs NNSA under contract DENA0003525.
Speaker Bio: Rupert Lewis received his PhD from Indiana University in 2001. He completed postdocs at the National High Magnetic Field Lab (in Tallahassee) and at the the University of Maryland where he worked on such diverse subjects as Wigner crystalization of 2D electron systems and superconducting implementations of quantum computing. Recently, he's branched out into reversible computing. He's been a staff member at Sandia since 2013. 
TzuMing Lu, Sandia National LabHole spins in Ge/GeSi heterostructuresThere is growing interest in leveraging the unique properties of holecarrier systems and their intrinsically strong spinorbit coupling to engineer novel qubits. For example, qubit controls using electric dipole spin resonance have recently been demonstrated in Ge/GeSi hole quantum dots. In this talk, we will present unique physical properties of holes in Ge/GeSi heterostructures as well as our ongoing efforts toward hole spin qubits, including development of gated device architectures, charge sensing, and magnetospectroscopy in the fewhole regime. We will also present our theoretical understanding and modeling of electric dipole spin resonance of holes in Ge quantum dots through intrinsic spinorbit coupling. An effective twolevel Hamiltonian for the spin of an individual hole is derived from the strain of the heterostructure and electrostatic potential, allowing for predictions on how the spin will respond to applied AC fields.
Acknowledgements:
This work was funded, in part, by the Laboratory Directed Research and Development Program and performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the US Department of Energy's National Nuclear Security Administration under contract DENA0003525. The views expressed in this article do not necessarily represent the views of the US Department of Energy or the United States Government. The work at NTU was supported by the Ministry of Science and Technology (10726228002018).
Speaker Bio: TzuMing Lu received his B.S. from National Taiwan University in 2004 and Ph.D. from Princeton University in 2011. After graduate school, he was a postdoctoral researcher at Sandia National Laboratories, New Mexico, where he is currently a Senior Member of Technical Staff. His research topics include semiconductor device physics, spinorbit coupling in solidstate systems, and quantum behavior of nanoscale structures. He is also a Center for Integrated Nanotechnologies (CINT) scientist, supporting user projects on quantum information science and solidstate physics at the nanoscale. 
Theresa Lynn, Harvey Mudd CollegeQuantum Secrets: Protecting Them in the Laboratory, Unraveling Them in the ClassroomI report on aspects of quantum education at Harvey Mudd beyond the quantum mechanics course sequence for physics majors. In upperlevel physics labs, for example, entangled photon experiments allow direct experimental investigation of phenomena central to quantum information, while NMR experiments give students valuable exposure to working with pulse sequences and the language of coherence times. In introductory courses, principles of quantum mechanics have been presented in the contexts of quantum optics and of materials science at both the firstsemester and sophomore levels. And outside the major, our undergraduate quantum information course relies on linear algebra but minimal background in physics, and regularly enrolls the majority of its students from outside the physics major (chiefly computer science and math majors). Time permitting, I will supplement this overview of quantum education at Harvey Mudd with some recent undergraduate research in my quantum optics group, where our work focuses on nonideal situations involving entanglement. In one project, we measure photon pairs partially entangled in polarization to show that certain partially entangled states have a surprising oneway feature in the way that measurements on one particle nonclassically alter the measurement statistics of the second (EPR steering). In another project, we have established several limits on how well nonentangling measurements can perform generalized Bell measurements on entangled states more complex than the twoqubit case; these limits are relevant to recent and nearterm experimental realizations of quantum teleportation and dense coding protocols.
Speaker Bio: Theresa Lynn received her B.A. in physics from Harvard and did her Ph.D. at Caltech doing experimental quantum optics and atomic physics. After working as a postdoc and staff scientist at Caltech in educational outreach and nuclear astrophysics, Theresa returned to AMO physics when she took a faculty position at Harvey Mudd College, where she has been since 2006. Her current research areas are quantum optics and fundamentals of quantum mechanics. Since 2014 she has taught an introductory quantum information course to an audience of physics and other STEM majors. 
Corey Rae McRea, National Institute of Standards and TechnologyThe Boulder Cryogenic Quantum TestbedThe investigation of materials losses at low powers and temperatures has been identified as critical for increasing performance and scalability of superconducting quantum computers. This investigation requires the dissemination of a community standard for the accurate and repeatable measurement and analysis of superconducting microwave resonators. JILA / CU’s Boulder Cryogenic Quantum Testbed (CQT) is a nonprofit, precompetitive research facility for developing and openly disseminating standard protocols to reproducibly measure the quality factor and performance characteristics of superconducting microwave resonators used in quantum computing circuits. The testbed was founded on a philosophy of open collaborative science by a joint initiative between government, academic, and industry partners.
Speaker Bio: Corey Rae McRae received her PhD in Quantum Information from the University of Waterloo in 2018. She is now a postdoctoral researcher at the National Institute of Standards and Technology Boulder, as well as the director of the Boulder Cryogenic Quantum Testbed at JILA, University of Colorado Boulder. She studies materials losses in superconducting quantum circuits as well as the behavior and performance of superconducting microwave resonators. 
Xiao Mi, GoogleQuantum supremacy using a programmable superconducting processorThe promise of quantum computers is that certain computational tasks might be executed exponentially faster on a quantum processor than on a classical processor. A fundamental challenge is to build a highfidelity processor capable of running quantum algorithms in an exponentially large computational space. Here we report the use of a processor with programmable superconducting qubits to create quantum states on 53 qubits, corresponding to a computational statespace of dimension 2^{53} (about 10^{16}). Measurements from repeated experiments sample the resulting probability distribution, which we verify using classical simulations. Our Sycamore processor takes about 200 seconds to sample one instance of a quantum circuit a million timesour benchmarks currently indicate that the equivalent task for a stateoftheart classical supercomputer would take approximately 10,000 years. This dramatic increase in speed compared to all known classical algorithms is an experimental realization of quantum supremacy for this specific computational task, heralding a muchanticipated computing paradigm.
Speaker Bio: Xiao Mi is an experimental physicst at Google working on quantum gate metrology and applications of nearterm quantum processors to condensed matter physics problems. Prior to joing Google, Xiao pioneered the integration of circuit quantum electrodynamics with semiconductor spin qubits during his PhD at Princeton. He is the recipient of the 2020 Richard Greene Condensed Matter Thesis Prize from the American Physical Society. 
Kater Murch, Washington UniversitySuperconducting quantum circuits: exploring frontiers of quantum measurement and dissipation at microwave frequenciesSuperconducting quantum circuits: exploring frontiers of quantum measurement and dissipation at microwave frequencies
The combination of coherent quantum bits, robust single qubit control, and quantum noise limited parametric amplifiers has yielded an unprecedented view into the physics of quantum measurement and quantum dissipation. I will survey a range of research topics that are currently open to experimental exploration with this platform, including weak measurement and quantum trajectories, nonMarkovian dynamics, effective nonHermitian dynamics, quantum thermodynamics, and quantum sensing. Speaker Bio: Kater Murch received his PhD in physics in 2008 from the University of California, Berkeley, with disseration research focusing on cold atom cavity QED and measurement backaction. His postdoctoral work at UC Berkeley focused on superconducting quantum circuits and quantum measurement. Since 2014, he has been at Washington University in St. Louis with work focusing on open quantum systems experiment with superconducting circuits. Kater has received an Alfred P. Sloan fellowship, an NSF CAREER award, and a Cottrell Scholar award. 
Richard T. Scalettar, University of California DavisQuantum Simulation Studies of Charge Patterns in FermiBose SystemsQuantum Simulation Studies of Charge Patterns in FermiBose Systems
The Holstein Model describes the interaction between fermions and a collection of local (dispersionless) phonon modes, and has intimate connections to the attractive Hubbard Hamiltonian. In the dilute limit, the phonon degrees of freedom dress the fermions, giving rise to polaron and bipolaron formation. At higher densities, the phonons mediate collective superconducting (SC) and charge density wave (CDW) phases. I will review the basic physics of the Holstein model and show results of some recent Quantum Monte Carlo (QMC) simulations where we have determined the quantum critical point and finite temperature transition points of the Holstein model on a honeycomb lattice, and also on the role of phonon dispersion on SC and CDW order. I will conclude the presentation by discussing a new, Langevinbased, algorithm which might allow connections to cold atom quantum simulators of BoseFermi mixtures. Speaker Bio: Richard Scalettar received his PhD in physics in 1986 from the University of California, Santa Barbara. In 1989, after a postdoc in the Chemistry Department at the University of Illinois, UrbanaChampaign, he joined the Physics faculty at the University of California, Davis. Prof. Scalettar's research is in the application of Quantum Monte Carlo methods to problems in quantum magnetism, superconductivity, and localization. He was elected Fellow of the American Physical Society in 2004, and served as chair of the APS Division of Computational Physics in 2010. In 2009, he received the Chancellor's Outstanding Undergraduate Mentor Award at UC Davis, and in 2014 was named as an outstanding referee of the American Physical Society. 
Raymond Simmonds, National Institute of Standards and TechnologyManipulating mechanical and electrical quanta with parametric circuitsParametric processes are ubiquitous in nature.
At their heart is an interaction that involves a nonlinear relationship between changing quantities. These processes can lead to energy transport in different forms. One form produces amplification, like the well known example of a child on a swing who periodically changes her center of gravity causing the resonance frequency of the swing to be modulated, inducing more swinging. Here, energy from her pumping legs at one frequency is absorbed and transferred into more motion at a different swinging frequency. This type of phenomenon can be mechanical (as with a swing) or electrical in nature, lending itself to many useful technological applications.
Parametric processes are paramount for new emerging quantum information technologies like lasercooled trapped ions, linear quantum optics, or optomechanics. Analogous physical systems can be created on a single chip using superconducting circuits, along with nonlinear Josephson junctions, or metalized flexible membrane capacitors. In this talk, I will discuss our experimental efforts at NIST to utilize parametric interactions to help control different physical processes that are important manipulating quantum information. Harnessing these processes onchip with superconducting circuit components, including microdrum mechanical resonators, electromagnetic cavity modes, and superconducting quantum bits provides a highly programmable platform for engineering both closed and open quantum systems for simulation or computation.
Speaker Bio: Ray Simmonds received his BA, MA, and PhD from the University of California, Berkeley in 2002, where he studied Quantum Interfrence in superfluid He3. After a 2 year postdoc at NIST in Boulder CO developing superconducting quantum bits, he became a staff physicist. His current research is focused on the application of superconducting microwave and optomechanical circuit techniques for quantum information, measurement, and computing. 
Timur Tscherbul, University of Nevada RenoQuantum coherence from thermal noise: From coherent dynamics to nonequilibrium steady statesQuantum coherence from thermal noise: From coherent dynamics to nonequilibrium steady states
Quantum coherence is widely regarded as an essential resource for quantum information processing and quantum sensing. In this talk, I will present an overview of our recent work on the quantum dynamics of noiseinduced Fano coherences that occur in multilevel quantum systems interacting with a thermal bath (such as blackbody radiation) in the absence of coherent driving. By solving the nonsecular BlochRedfield quantum master equation for a model threelevel Vsystem driven by a thermal bath, we show that Fano coherences exhibit quantum beats when the spacing between the excited states of the Vsystem is large compared to the radiative decay rates. In the opposite limit of small excitedstate spacing, we observe the emergence of nonequilibrium quasisteady states, which become true nonequilibrium steady states if the thermal driving is polarized. The general theory will be illustrated with two examples involving the time evolution of Fano coherences in Rydberg atoms immersed in blackbody radiation and the breaking of detailed balance in atomic calcium driven by polarized incoherent light. Implications of these results for quantum information processing and quantum thermodynamics will be discussed. Speaker Bio: Tscherbul Timur earned his PhD from Moscow State University, and received a Killam postdoctoral fellowship at the University of British Columbia. He joined the faculty at the University of Nevada, Reno in 2015 after working as a postdoc at Harvard and the University of Toronto. He is a computational quantum physisist interested in the theory of open quantum systems, quantum dynamics and control of complex atomic and molecular systems, quantum impurity problems, and diagrammatic Monte Carlo methods. 
Zhexuan Gong, Colorado School of MinesSpeed limit of entangling gates in quantum computers: Theory and Experiment.Fast twoqubit entangling gates are essential for quantum computers with finite coherence times. Due to the limit of interaction strength among qubits, there exists a theoretical speed limit for a given twoqubit entangling gate. This speed limit has been explicitly found only for a twoqubit system and under the assumption of negligible single qubit gate time. We propose to demonstrate such speed limit experimentally using two superconducting transmon qubits with an alwayson capacitive coupling. Moreover, we investigate a modified speed limit when single qubit gate time is not negligible, as in any practical experimental setup. Finally, we study the generalization to multiple qubit systems where the coupling to additional qubits can significantly increase the speed limit of a twoqubit entangling gate, thus requiring the codesign of the quantum computer from both theorists and experimentalists for optimal gate performance.
Speaker Bio: Zhexuan Gong received his PhD in Physics from the University of Michigan in 2013. He was then a postdoctoral research associate and research scientist at the Joint Quantum Institute, University of Maryland and NIST. He joined Mines in 2018 as an assistant professor and also holds a NIST associate position. His areas of research include quantum computing, quantum information theory, and quantum manybody physics. 
Poster Session
Name  Inst  Poster Title 

Kirsten Blagg  Mines  Thermoelectric effects in Superconductor Ferromagnetic Hybrids 
Jacob Cutshall  Reed  A New Form of Quantum Tomography 
Mina Fasihi  Mines  Complex network description of phase transitions in the classical and quantum disordered Ising Model 
Patrick Harrington  Wash U.  Photonic transport in quantum metamaterials 
Joel Howard  Mines  Investigating Entanglement Rates of Coupled Superconducting Qubits 
Matthew Jones  Mines  Open Source Matrix Product States: A Simulation Platform for Quantum Computing Technologies 
Eric Jones  Mines  Variational preparation of quantum Hall states on a lattice 
Sarah Jones  Mines  Effects of Nanoparticle Size and Density on Vortex Creep in (Y,Gd)BCO Films 
Daria Kowsari  Wash U.  Memory in nonMarkovian Open Quantum Systems 
Suyesh Koyu  UNR  Quantum Coherent Dynamics from Thermal Noise: A Threelevel Vsystem Driven by Incoherent Radiation 
Alex Lidiak  Mines  Quantum State Compression and Analysis via Dimensionality Reduction 
Brad Lloyd  Mines  Quantum Dots in Silicon as a Candidate Platform for Scalable Quantum Computing and Quantum Neuromorphic Devices 
Nick Materise  Mines  Quantum Heat Engine Simulated on Superconducting Qubits 
David Rodriguez Perez  Mines  Variable Dissipation in Small Logical Qubits 
Zhijie Tang  Mines  Theoretical survey of unconventional quantum annealing methods applied to a difficult trial problem 
Brooks Venuti  Mines  Probing Magnetic Skyrmions in the Presence of Disorder 
Joshua Lewis  Mines  Fractional Calculus in the Analysis of Quantum Systems 
Organizers
Attendees
Name  Institution 

Adams, Daniel  Colorado School of Mines 
Alberi, Kirstin  National Renewable Energy Laboratory 
Alrumaih, Amani  Colorado School of Mines 
Bachman, Kate  Colorado School of Mines 
Bauers, Sage  National Renewable Energy Laboratory 
Beard, Matt  National Renewable Energy Laboratory 
Beck, Mark  Reed College 
Becker, Dylon  Colorado School of Mines 
Been, Joel  Colorado School of Mines 
Bielejec, Edward  Sandia National Lab 
Blagg, Kirsten  Colorado School of Mines 
Brennecka, Geoff  Colorado School of Mines 
Breznay, Nicholas  Harvey Mudd College 
Brooks, Jeremy  Colorado School of Mines 
Brown, Kirsten  Colorado School of Mines 
Bruce, Kane  Colorado School of Mines 
Bush, Brian  National Renewable Energy Laboratory 
Carr, Lincoln  Colorado School of Mines 
Chen, Xiaowen  National Renewable Energy Laboratory 
Chen, Xihan  National Renewable Energy Laboratory 
Cole, Haley  Colorado School of Mines 
Collins, Reuben  Colorado School of Mines 
Cutshall, Jacob  Reed College 
DeMott, Roswell  Colorado School of Mines 
DeWolfMoura, Tyjal  Colorado School of Mines 
Downie, Khloe  Colorado School of Mines 
Eley, Serena  Colorado School of Mines 
Fasihi, Mina  Colorado School of Mines 
Fearing, Steven  Colorado School of Mines 
Ferguson, Andrew  National Renewable Energy Laboratory 
Giddins, Heather  Colorado School of Mines 
Godfrey, Christian  Colorado School of Mines 
Gong, Zhexuan  Colorado School of Mines 
Gorman, Brian  Colorado School of Mines 
Haack, Casey  Colorado School of Mines 
Halaoui, Adam  The University of Denver 
Harrington, Patrick  Washington University St. Louis 
Honors, Dylan  Colorado School of Mines 
Howard, Joel  Colorado School of Mines 
Hurst, Hilary  Joint Quantum Institute/San Jose State University 
Iverson, Gabriel  Joint Quantum Institute/San Jose State University 
Jameson, Casey  Colorado School of Mines 
Johnson, Justin  National Renewable Energy Laboratory 
Jones, Eric  Colorado School of Mines 
Jones, Matthew  Colorado School of Mines 
Jones, Sarah  Colorado School of Mines 
Kapit, Eliot  Colorado School of Mines 
Kehyias, Pauli  Sandia National Lab 
Kelly, Brian  Colorado School of Mines 
Khatami, Ehsan  San Jose State University 
Kowsari, Daria  Washington University St. Louis 
Koyu, Suyesh  University of Nevada Reno 
Kuklin, Jackson  Colorado School of Mines 
Kumar, Nitin  Colorado School of Mines 
Lewis, Josh  Colorado School of Mines 
Lewis, Rupert  Sandia National Lab 
Lidiak, Alexander  Colorado School of Mines 
Lloyd, Bradley  Colorado School of Mines 
Lu, TzuMing  Sandia National Lab 
Luhman, Dwight  Sandia National Lab 
Lusk, Mark  Colorado School of Mines 
Lynn, Theresa  Harvey Mudd College 
Materise, Nick  Colorado School of Mines 
Matlock, Charles  Colorado School of Mines 
McKinsey, Joseph  Colorado School of Mines 
McMullen, Skyler  Colorado School of Mines 
McPherson, Alexandria  Colorado School of Mines 
McRae, Corey Rae  National Institute of Standards and Technology 
Mi, Xiao  
Mikulich, Alexander  Colorado School of Mines 
Mohammad, Majid  Colorado School of Mines 
Monaghan, Austin  Colorado School of Mines 
Moses, Joshua  Colorado School of Mines 
Murch, Kater  Washington University St. Louis 
Niyonkuru, Paul  Colorado School of Mines 
Osella, Anna  National Renewable Energy Laboratory 
Parrott, Zachary  Colorado School of Mines 
Paver, Brendan  Colorado School of Mines 
QuispeFlores, Carla  Colorado School of Mines 
Ramos De Oliveira, Jona  Colorado School of Mines 
Riddle, Sam  Colorado School of Mines 
Rodriguez Perez, David  Colorado School of Mines 
Sanders, Caleb  Colorado School of Mines 
Scalettar, Richard  University of California Davis 
Schenken, William  Colorado School of Mines 
Schroeter, Darrell  Reed College 
Selinger, Alan  Colorado School of Mines 
Simmonds, Ray  National Institute of Standards and Technology 
Singh, Meenakshi  Colorado School of Mines 
Smith, Connor  Colorado School of Mines 
Soto Ramos de Oliveira, Jonatan  Soto Ramos de Oliveira 
Stone, Chuck  Colorado School of Mines 
Supple, Edwin  Colorado School of Mines 
Swirtz, Madison  Colorado School of Mines 
Tang, Zhije  Colorado School of Mines 
Tavenner, Jacob  Colorado School of Mines 
Tellez Gonzalez, Jaime  Colorado School of Mines 
Torres, Andrew  University of Denver 
Tscherbul, Timur  University of Nevada Reno 
Varosy, Paul  Colorado School of Mines 
Venuti, Brooks  Colorado School of Mines 
Wagner, Taylor  Colorado School of Mines 
Walden, Michael  Colorado School of Mines 
Wiesner, Laura  Colorado School of Mines 
Willner, Jackson  Colorado School of Mines 
Wilson, Alexander  Colorado School of Mines 
Wu, David  Colorado School of Mines 
Zabrocky, Mallory  Colorado School of Mines 
Ziyad, Jalan  Reed College 
Lodging and Travel
Workshop lodging will be at Table Mountain Inn and can be arranged through us at quantum@mines.edu.
Plane tickets will be reimbursed for workshop participants coming from outside Colorado, and confirmed speakers or participants should go ahead and purchase those. Please double check with us at quantum@mines.edu if your cost is over $400.
For getting to Golden, we recommend the easy and reliable lightrail system that leaves directly from the airport:
RTD rail system, Rail System Map
Take the A train from the airport to Union station at the end of the A line. Then transfer to the W train and ride it to the end of the W line in Golden. There is a small bus every 15 minutes that takes you straight downtown from there.
Uber and Lyft are about $6080 one way. A taxi will cost around $100+. Other alternatives include:
Denvers Airport Transportation
Transit Van Shuttle
Funding
Introduction
We are pleased to invite you to the 1st Workshop of the Open Quantum Frontier Institute, which will take place at the Colorado School of Mines in Golden, CO on February 2122, 2020. The purpose of the workshop is to advance quantum information research in noisy and open quantum systems and build quantum engineering education programs throughout the U.S. Our twoday workshop will feature:
 Invited talks given by professors, postdocs, and senior researchers
 Posters presented by postdocs, graduate, and undergraduate students
 Poster award
 Student travel support (TBD)
 Catered lunch and coffee breaks
For more information, please contact quantum@mines.edu.
Registration Information
Our workshop is open for broad participation and can support up to 180 attendees.
Online registration closed on February 19, 2020. You may still be able to register. Please contact us at quantum@mines.edu.
Conference Location
Friday 2/21 and Saturday 2/22, Green Center Metals Hall, Colorado School of Mines
Schedule
Date, Time  Activity 

Friday 2/21  
08:0009:00 AM  Registration, Breakfast, Coffee 
09:0009:15 AM  Lincoln Carr Welcoming Remarks 
Oral Session I Quantum Simulations Mina Fasihi, Chair 

25 min talk, 5 minutes for questions  
09:1509:45 AM  Hilary Hurst, Joint Quantum Institute/San Jose State UniversityQuantum Control with Spinor BoseEinstein CondensatesUnderstanding and controlling manybody quantum systems in noisy environments is paramount to developing robust quantum technologies. An external environment can be thought of as a measurement reservoir which extracts information about the quantum system. Cold atoms are well suited to examine systemenvironment interaction via weak (i.e. minimally destructive) measurement techniques, wherein the measurement probe acts as the environment and also provides a noisy record of system dynamics. The measurement record can then be used in a feedback scheme, opening the door to real time control of quantum gases. In this talk I discuss our theoretical proposal to use weak measurement and feedback to engineer new phases in spin1/2 BoseEinstein condensates. We show that measurement and feedback alters the effective Hamiltonian governing system dynamics, thereby driving phase transitions reminiscent of a quantum quench for the closed system. We also develop a feedback cooling protocol which prevents runaway heating of the condensate due to measurement backaction. Our results show that measurement and feedback can alter condensate dynamics in a stable, controllable manner and provides a route toward Hamiltonian engineering in manybody systems. Finally, I will discuss ongoing experimental work to realize our proposal using Rb87.
Speaker Bio: Hilary Hurst received her BS in Engineering Physics from the Colorado School of Mines. She went on to earn a Masters in Theoretical Physics at the University of Cambridge and received her PhD in physics from the University of Maryland. She is currently an NRC Postdoctoral Fellow at NIST and the Joint Quantum Institute and will be joining the faculty at San Jose State University in the Fall. Her areas of research include quantum measurement and feedback control for manybody systems and magnetization dynamics in dissipative systems. 
09:4510:15 AM  Richard T. Scalettar, University of California DavisQuantum Simulation Studies of Charge Patterns in FermiBose SystemsThe Holstein Model describes the interaction between fermions and a collection of local (dispersionless) phonon modes, and has intimate connections to the attractive Hubbard Hamiltonian. In the dilute limit, the phonon degrees of freedom dress the fermions, giving rise to polaron and bipolaron formation. At higher densities, the phonons mediate collective superconducting (SC) and charge density wave (CDW) phases. I will review the basic physics of the Holstein model and show results of some recent Quantum Monte Carlo (QMC) simulations where we have determined the quantum critical point and finite temperature transition points of the Holstein model on a honeycomb lattice, and also on the role of phonon dispersion on SC and CDW order. I will conclude the presentation by discussing a new, Langevinbased, algorithm which might allow connections to cold atom quantum simulators of BoseFermi mixtures.
Speaker Bio: Richard Scalettar received his PhD in physics in 1986 from the University of California, Santa Barbara. In 1989, after a postdoc in the Chemistry Department at the University of Illinois, UrbanaChampaign, he joined the Physics faculty at the University of California, Davis. Prof. Scalettar's research is in the application of Quantum Monte Carlo methods to problems in quantum magnetism, superconductivity, and localization. He was elected Fellow of the American Physical Society in 2004, and served as chair of the APS Division of Computational Physics in 2010. In 2009, he received the Chancellor's Outstanding Undergraduate Mentor Award at UC Davis, and in 2014 was named as an outstanding referee of the American Physical Society. 
10:1510:30 AM  Coffee and Snacks 
Oral Session II Quantum Computing 1 Matthew Jones, Chair 

10:3011:00 AM  Zhexuan Gong, Colorado School of MinesSpeed limit of entangling gates in quantum computers: Theory and Experiment.Fast twoqubit entangling gates are essential for quantum computers with finite coherence times. Due to the limit of interaction strength among qubits, there exists a theoretical speed limit for a given twoqubit entangling gate. This speed limit has been explicitly found only for a twoqubit system and under the assumption of negligible single qubit gate time. We propose to demonstrate such speed limit experimentally using two superconducting transmon qubits with an alwayson capacitive coupling. Moreover, we investigate a modified speed limit when single qubit gate time is not negligible, as in any practical experimental setup. Finally, we study the generalization to multiple qubit systems where the coupling to additional qubits can significantly increase the speed limit of a twoqubit entangling gate, thus requiring the codesign of the quantum computer from both theorists and experimentalists for optimal gate performance.
Speaker Bio: Zhexuan Gong received his PhD in Physics from the University of Michigan in 2013. He was then a postdoctoral research associate and research scientist at the Joint Quantum Institute, University of Maryland and NIST. He joined Mines in 2018 as an assistant professor and also holds a NIST associate position. His areas of research include quantum computing, quantum information theory, and quantum manybody physics. 
11:0011:30 AM  Xiao Mi, GoogleQuantum supremacy using a programmable superconducting processorThe promise of quantum computers is that certain computational tasks might be executed exponentially faster on a quantum processor than on a classical processor. A fundamental challenge is to build a highfidelity processor capable of running quantum algorithms in an exponentially large computational space. Here we report the use of a processor with programmable superconducting qubits to create quantum states on 53 qubits, corresponding to a computational statespace of dimension 2^{53} (about 10^{16}). Measurements from repeated experiments sample the resulting probability distribution, which we verify using classical simulations. Our Sycamore processor takes about 200 seconds to sample one instance of a quantum circuit a million timesour benchmarks currently indicate that the equivalent task for a stateoftheart classical supercomputer would take approximately 10,000 years. This dramatic increase in speed compared to all known classical algorithms is an experimental realization of quantum supremacy for this specific computational task, heralding a muchanticipated computing paradigm.
Speaker Bio: Xiao is an experimental physicst at Google working on quantum gate metrology and applications of nearterm quantum processors to condensed matter physics problems. Prior to joing Google, Xiao pioneered the integration of circuit quantum electrodynamics with semiconductor spin qubits during his PhD at Princeton. He is the recipient of the 2020 Richard Greene Condensed Matter Thesis Prize from the American Physical Society. 
Oral Session III Open Quantum Systems Tyjal DewolfMoura, Chair 

11:3012:00 PM  Eliot Kapit, Colorado School of MinesNoisetolerant quantum speedups in quantum annealing without fine tuningQuantum annealing is a powerful alternative model for quantum computing, which can succeed in the presence of environmental noise even without error correction. However, despite great effort, no conclusive proof of a quantum speedup (relative to state of the art classical algorithms) has been shown for these systems, and rigorous theoretical proofs of a quantum advantage generally rely on exponential precision in at least some aspects of the system, an unphysical resource guaranteed to be scrambled by random noise. In this work, we propose a new variant of quantum annealing, called RFQA, which can maintain a scalable quantum speedup in the face of noise and modest control precision. Specifically, we consider a modification of flux qubitbased quantum annealing which includes random, but coherent, lowfrequency oscillations in the directions of the transverse field terms as the system evolves. We show that this method produces a quantum speedup for finding ground states in the Grover problem and quantum random energy model, and thus should be widely applicable to other hard optimization problems which can be formulated as quantum spin glasses. Further, we show that this speedup should be resilient to two realistic noise channels (1⁄_{f}like local potential fluctuations and local heating from interaction with a finite temperature bath), and that another noise channel, bathassisted quantum phase transitions, actually accelerates the algorithm and may outweigh the negative effects of the others. The modifications we consider have a straightforward experimental implementation and could be explored with current technology.
Speaker Bio: Eliot Kapit receieved his PhD from Cornell in 2012. From there, he did postdocs at Oxford and the City University of New York, before starting as an Assistant Professor of Physics at Tulane University from 20152018. In summer 2018, he joined the faculty of Colorado School of Mines. His research focuses on quantum information, manybody physics, and novel superconducting circuits. 
12:0012:30 PM  Timur Tscherbul, University of Nevada RenoQuantum coherence from thermal noise: From coherent dynamics to nonequilibrium steady statesQuantum coherence is widely regarded as an essential resource for quantum information processing and quantum sensing. In this talk, I will present an overview of our recent work on the quantum dynamics of noiseinduced Fano coherences that occur in multilevel quantum systems interacting with a thermal bath (such as blackbody radiation) in the absence of coherent driving. By solving the nonsecular BlochRedfield quantum master equation for a model threelevel Vsystem driven by a thermal bath, we show that Fano coherences exhibit quantum beats when the spacing between the excited states of the Vsystem is large compared to the radiative decay rates. In the opposite limit of small excitedstate spacing, we observe the emergence of nonequilibrium quasisteady states, which become true nonequilibrium steady states if the thermal driving is polarized. The general theory will be illustrated with two examples involving the time evolution of Fano coherences in Rydberg atoms immersed in blackbody radiation and the breaking of detailed balance in atomic calcium driven by polarized incoherent light. Implications of these results for quantum information processing and quantum thermodynamics will be discussed.
Speaker Bio: Tscherbul Timur earned his PhD from Moscow State University, and received a Killam postdoctoral fellowship at the University of British Columbia. He joined the faculty at the University of Nevada, Reno in 2015 after working as a postdoc at Harvard and the University of Toronto. He is a computational quantum physisist interested in the theory of open quantum systems, quantum dynamics and control of complex atomic and molecular systems, quantum impurity problems, and diagrammatic Monte Carlo methods. 
12:3001:30 PM  Catered Lunch 
Oral Session IV Quantum Computing 2 Kirsten Blagg, Chair 

01:3002:00 PM  Justin Johnson, National Renewable Energy LabMolecular approaches to robust qubits: theory, structures, and spectroscopyThe versatility of chemical substitution provides nearly infinite space for controlling energy levels and electronic/spin population flow in conjugated organic molecules, and as such, excitedstate molecular systems may lend themselves robust qubits with unique properties. We have chosen to investigate the spin states of triplet exciton pairs that are generated quickly upon photoexcitation of tailored molecules and appear to be protected from decoherence even at room temperature until decay to the ground state on a microsecond timescale. Strong spin polarization seems inherent in some of these systems, as detected through the distinct pattern of microwave absorption in a static magnetic field (i.e., EPR spectra). Furthermore, some molecules produce photon emission that is dependent on the exact spin state, much like nitrogen vacancy in diamond systems where magnetic resonance is detected optically. We are a building a library of molecules that can be coupled to each other with tunable strengths and geometries in order to understand the fundamental properties of spinentangled triplet pairs, and more incisively to evaluate whether or not there might be inherent advantages of this approach, especially in terms of sensitivity to noise, compared with more conventional open quantum systems. This is an early stage and focused effort, but we hope to make connections to other work to uncover synergies or extensions of our ideas and capabilities that impact QIS more broadly.
Speaker Bio: Justin Johnson has been a senior scientist at the National Renewable Energy Laboratory (NREL) since 2008 and is also a joint appointee in Chemistry at Colorado School of Mines. He received his Ph.D. in Chemistry from the University of California, Berkeley, in 2004 and subsequently did postdoctoral work with Dr. Arthur Nozik at NREL and Prof. Josef Michl at the University of Colorado, Boulder. His technical expertise is in ultrafast and nonlinear spectroscopy, and his research interests include investigating the dynamics of photophysical phenomena associated with solar light harvesting, energy storage, and quantum information in both molecular and nanoscale semiconductor systems. 
02:0002:30 PM  Raymond Simmonds, National Institute of Standards and TechnologyManipulating mechanical and electrical quanta with parametric circuitsParametric processes are ubiquitous in nature.
At their heart is an interaction that involves a nonlinear relationship between changing quantities. These processes can lead to energy transport in different forms. One form produces amplification, like the well known example of a child on a swing who periodically changes her center of gravity causing the resonance frequency of the swing to be modulated, inducing more swinging. Here, energy from her pumping legs at one frequency is absorbed and transferred into more motion at a different swinging frequency. This type of phenomenon can be mechanical (as with a swing) or electrical in nature, lending itself to many useful technological applications.
Parametric processes are paramount for new emerging quantum information technologies like lasercooled trapped ions, linear quantum optics, or optomechanics. Analogous physical systems can be created on a single chip using superconducting circuits, along with nonlinear Josephson junctions, or metalized flexible membrane capacitors. In this talk, I will discuss our experimental efforts at NIST to utilize parametric interactions to help control different physical processes that are important manipulating quantum information. Harnessing these processes onchip with superconducting circuit components, including microdrum mechanical resonators, electromagnetic cavity modes, and superconducting quantum bits provides a highly programmable platform for engineering both closed and open quantum systems for simulation or computation.
Speaker Bio: Ray Simmonds received his BA, MA, and PhD from the University of California, Berkeley in 2002, where he studied Quantum Interfrence in superfluid He3. After a 2 year postdoc at NIST in Boulder CO developing superconducting quantum bits, he became a staff physicist. His current research is focused on the application of superconducting microwave and optomechanical circuit techniques for quantum information, measurement, and computing. 
02:3003:00 PM  Coffee and Cookies 
03:0006:00 PM  Open Quantum Frontier Institute Strategy Meeting and Breakout Sessions 
Saturday 2/22  
08:0009:00 AM  Breakfast, Coffee 
08:50 AM  Opening Remarks 
Oral Session V Materials for Quantum Information Science Edwin Supple, Chair 

09:0009:30 AM  TzuMing Lu, Sandia National LabHole spins in Ge/GeSi heterostructuresThere is growing interest in leveraging the unique properties of holecarrier systems and their intrinsically strong spinorbit coupling to engineer novel qubits. For example, qubit controls using electric dipole spin resonance have recently been demonstrated in Ge/GeSi hole quantum dots. In this talk, we will present unique physical properties of holes in Ge/GeSi heterostructures as well as our ongoing efforts toward hole spin qubits, including development of gated device architectures, charge sensing, and magnetospectroscopy in the fewhole regime. We will also present our theoretical understanding and modeling of electric dipole spin resonance of holes in Ge quantum dots through intrinsic spinorbit coupling. An effective twolevel Hamiltonian for the spin of an individual hole is derived from the strain of the heterostructure and electrostatic potential, allowing for predictions on how the spin will respond to applied AC fields.
Acknowledgements:
This work was funded, in part, by the Laboratory Directed Research and Development Program and performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the US Department of Energy's National Nuclear Security Administration under contract DENA0003525. The views expressed in this article do not necessarily represent the views of the US Department of Energy or the United States Government. The work at NTU was supported by the Ministry of Science and Technology (10726228002018).
Speaker Bio: TzuMing Lu received his B.S. from National Taiwan University in 2004 and Ph.D. from Princeton University in 2011. After graduate school, he was a postdoctoral researcher at Sandia National Laboratories, New Mexico, where he is currently a Senior Member of Technical Staff. His research topics include semiconductor device physics, spinorbit coupling in solidstate systems, and quantum behavior of nanoscale structures. He is also a Center for Integrated Nanotechnologies (CINT) scientist, supporting user projects on quantum information science and solidstate physics at the nanoscale. 
09:3010:00 AM  Rupert Lewis, Sandia National LabReversible Superconducting Logic for Low Power ComputationReversible computing is the ultimate low energy computing technology. To be reversible, a computational operation must not only be able to run forward or backward but must preserve the energy of a bit. In practice, performing logic operations at or below the Landauer limit of kBT ln2 per logical operation is the goal of the field.
Superconducting circuits are the perfect technology for implementing ballistic reversible circuits due to inherently low losses and the use of single flux quanta as robust bits. I will discuss our progress towards an asynchronous ballistic reversible logic based on fluxons propagating along superconducting lines and incorporating Josephson junctions as active elements.
While superconducting logic families have the longterm potential of transforming high performance computing such as data centers, in the near term, the greatest impact is likely to be on quantum computers where the low energy dissipation (relative to transistorized logic) will enable in cryostat control of quantum computers. Funding Statement: Supported by the LDRD program at SNL, a multimission laboratory managed and operated by NTESS, LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. DOEs NNSA under contract DENA0003525.
Speaker Bio: Rupert Lewis received his PhD from Indiana University in 2001. He completed postdocs at the National High Magnetic Field Lab (in Tallahassee) and at the the University of Maryland where he worked on such diverse subjects as Wigner crystalization of 2D electron systems and superconducting implementations of quantum computing. Recently, he's branched out into reversible computing. He's been a staff member at Sandia since 2013. 
10:0010:30 AM  Corey Rae McRea, National Institute of Standards and TechnologyThe Boulder Cryogenic Quantum TestbedThe investigation of materials losses at low powers and temperatures has been identified as critical for increasing performance and scalability of superconducting quantum computers. This investigation requires the dissemination of a community standard for the accurate and repeatable measurement and analysis of superconducting microwave resonators. JILA / CU’s Boulder Cryogenic Quantum Testbed (CQT) is a nonprofit, precompetitive research facility for developing and openly disseminating standard protocols to reproducibly measure the quality factor and performance characteristics of superconducting microwave resonators used in quantum computing circuits. The testbed was founded on a philosophy of open collaborative science by a joint initiative between government, academic, and industry partners.
Speaker Bio: Corey Rae McRae received her PhD in Quantum Information from the University of Waterloo in 2018. She is now a postdoctoral researcher at the National Institute of Standards and Technology Boulder, as well as the director of the Boulder Cryogenic Quantum Testbed at JILA, University of Colorado Boulder. She studies materials losses in superconducting quantum circuits as well as the behavior and performance of superconducting microwave resonators. 
10:3011:00 AM  Coffee and Snacks 
Oral Session VI Quantum Measurement and Sensing Joel Howard, Chair 

11:0011:30 AM  Kater Murch, Washington UniversitySuperconducting quantum circuits: exploring frontiers of quantum measurement and dissipation at microwave frequenciesJosephson junction based quantum circuits have enabled broad exploration into open quantum systems in the microwave frequency domain. The combination of coherent quantum bits, robust single qubit control, and quantum noise limited parametric amplifiers has yielded an unprecedented view into the physics of quantum measurement and quantum dissipation. I will survey a range of research topics that are currently open to experimental exploration with this platform, including weak measurement and quantum trajectories, nonMarkovian dynamics, effective nonHermitian dynamics, quantum thermodynamics, and quantum sensing.
Speaker Bio: Kater Murch received his PhD in physics in 2008 from the University of California, Berkeley, with disseration research focusing on cold atom cavity QED and measurement backaction. His postdoctoral work at UC Berkeley focused on superconducting quantum circuits and quantum measurement. Since 2014, he has been at Washington University in St. Louis with work focusing on open quantum systems experiment with superconducting circuits. Kater has received an Alfred P. Sloan fellowship, an NSF CAREER award, and a Cottrell Scholar award. 
11:3012:00 PM  Pauli Kehayias, Sandia National LabMagnetic sensing using nitrogenvacancy centers in diamondNitrogenvacancy (NV) centers in diamond have gained much recent interest for their uses in magnetic sensing and quantum information. NV centers are fluorescent defect centers that have discrete electronic states with fewmillisecond lifetimes, can be optically initialized and read out, are magnetically sensitive, and work in ambient conditions or extreme environments. Furthermore, our ability to place NV centers near the diamond surface (as close as a few nanometers) enables us to have a small separation between the NVs and external magnetic field sources, allowing us to sense external sources with high spatial resolution and sensitivity. After introducing NV DC and AC magnetometry techniques, I will present some ongoing NV magnetic sensing applications, including smallvolume NMR spectroscopy, magnetometry and pressure sensing in a diamond anvil cell, and magnetic microscopy for geology, biology, and condensedmatter physics.
Speaker Bio: Pauli did his PhD work at UC Berkeley, after which he was a postdoc at Harvard. Currently he is a Truman Fellowship postdoc at Sandia National Labs. He works on magnetic sensing and imaging with nitrogenvacancy centers in diamond, with applications in NMR spectroscopy, paleomagnetism, biomagnetism, and magnetic materials. 
12:0001:00 PM  Catered Lunch and Breakout Session 
Oral Session VII Quantum Education Casey Jameson, Chair 

25 min talk, 5 minutes for questions  
01:0001:30 PM  Mark Beck, Reed CollegeExploring Fundamentals of Quantum Mechanics with OpticsIndividual photons and entangledphoton pairs are excellent resources for exploring fundamental questions in quantum mechanics. We, and others, have developed a number of teaching laboratories that use these resources to do precisely that. The experiments include: "Proving" that light consists of photons, singlephoton interference, and tests of local realism. I will describe some of these experiments, as well as the physics behind them. I will also describe our recent work on experiments that involve more than two photons.
Speaker Bio: Mark Beck received his BS and PhD degrees in Optics from the University of Rochester. He was a postdoctoral researcher at the University of Oregon, and has taught physics at Reed College and Whitman College since 1994. His areas of research specialization are quantum optics and quantum measurement. In 2018 he was the recipient of the Richtmyer Memorial Lecture Award from the American Association of Physics Teachers. 
01:3002:00 PM  Theresa Lynn, Harvey Mudd CollegeQuantum Secrets: Protecting Them in the Laboratory, Unraveling Them in the ClassroomI report on aspects of quantum education at Harvey Mudd beyond the quantum mechanics course sequence for physics majors. In upperlevel physics labs, for example, entangled photon experiments allow direct experimental investigation of phenomena central to quantum information, while NMR experiments give students valuable exposure to working with pulse sequences and the language of coherence times. In introductory courses, principles of quantum mechanics have been presented in the contexts of quantum optics and of materials science at both the firstsemester and sophomore levels. And outside the major, our undergraduate quantum information course relies on linear algebra but minimal background in physics, and regularly enrolls the majority of its students from outside the physics major (chiefly computer science and math majors). Time permitting, I will supplement this overview of quantum education at Harvey Mudd with some recent undergraduate research in my quantum optics group, where our work focuses on nonideal situations involving entanglement. In one project, we measure photon pairs partially entangled in polarization to show that certain partially entangled states have a surprising oneway feature in the way that measurements on one particle nonclassically alter the measurement statistics of the second (EPR steering). In another project, we have established several limits on how well nonentangling measurements can perform generalized Bell measurements on entangled states more complex than the twoqubit case; these limits are relevant to recent and nearterm experimental realizations of quantum teleportation and dense coding protocols.
Speaker Bio: Theresa Lynn received her B.A. in physics from Harvard and did her Ph.D. at Caltech doing experimental quantum optics and atomic physics. After working as a postdoc and staff scientist at Caltech in educational outreach and nuclear astrophysics, Theresa returned to AMO physics when she took a faculty position at Harvey Mudd College, where she has been since 2006. Her current research areas are quantum optics and fundamentals of quantum mechanics. Since 2014 she has taught an introductory quantum information course to an audience of physics and other STEM majors. 
02:0004:00 PM  Poster Session with Coffee and CookiesKirsten Blagg Colorado School of Mines Thermoelectric Effects in Superconductor Ferromagnetic Hybrids Jacob CutshallReed College A New Form of Quantum Tomography Mina FasihiColorado School of Mines Complex Network Description of Phase Transitions in the Classical and Quantum Disordered Ising Model Patrick Harrington Washington University St. Louis Photonic Transport in Quantum Metamaterials Joel Howard Colorado School of Mines Investigating Entanglement Rates of Coupled Superconducting Qubits Eric Jones Colorado School of Mines Variational Preparation of Quantum Hall States on a Lattice Matthew Jones Colorado School of Mines Open Source Matrix Product States: A Simulation Platform for Quantum Computing Technologies Daria Kowsari Washington University St. Louis Memory in NonMarkovian Open Quantum Systems Suyesh Koyu University of Nevada Reno Quantum Coherent Dynamics from Thermal Noise: A Threelevel Vsystem Driven by Incoherent Radiation Joshua Lewis Colorado School of Mines Use of Fractional Calculus in the Analysis of Quantum Systems Alex Lidiak Colorado School of Mines Quantum State Compression and Analysis via Dimensionality Reduction Bradley Lloyd Colorado School of Mines Quantum Dots in Silicon as a Candidate Platform for Scalable Quantum Computing and Quantum Neuromorphic Devices Nick Materise Colorado School of Mines Quantum Heat Engine Simulated on Superconducting Qubits David Rodriguez Perez Colorado School of Mines Variable Dissipation in Small Logical Qubits Zhijie Tang Colorado School of Mines Theoretical Survey of Unconventional Quantum Annealing Methods Applied to a Difficult Trial Problem Brooks Venuti Colorado School of Mines Probing Magnetic Skyrmions in the Presence of Disorder 
04:0004:30 PM  Poster Awards, Final Remarks. Workshop ends for most participants 
04:3005:00 PM  Breakout Session Summaries: Recommendations for QLCI Proposal 
05:0006:00 PM  Open Quantum Frontier Institute Strategy Closed Meeting 
Invited Speakers
Speaker/Inst/Abstract/Bio 

Mark Beck, Reed CollegeExploring Fundamentals of Quantum Mechanics with OpticsIndividual photons and entangledphoton pairs are excellent resources for exploring fundamental questions in quantum mechanics. We, and others, have developed a number of teaching laboratories that use these resources to do precisely that. The experiments include: "Proving" that light consists of photons, singlephoton interference, and tests of local realism. I will describe some of these experiments, as well as the physics behind them. I will also describe our recent work on experiments that involve more than two photons.
Speaker Bio: Mark Beck received his BS and PhD degrees in Optics from the University of Rochester. He was a postdoctoral researcher at the University of Oregon, and has taught physics at Reed College and Whitman College since 1994. His areas of research specialization are quantum optics and quantum measurement. In 2018 he was the recipient of the Richtmyer Memorial Lecture Award from the American Association of Physics Teachers. 
Hilary Hurst, Joint Quantum Institute/San Jose State UniversityQuantum Control with Spinor BoseEinstein CondensatesQuantum Control with Spinor BoseEinstein Condensates
Understanding and controlling manybody quantum systems in noisy environments is paramount to developing robust quantum technologies. An external environment can be thought of as a measurement reservoir which extracts information about the quantum system. Cold atoms are well suited to examine systemenvironment interaction via weak (i.e. minimally destructive) measurement techniques, wherein the measurement probe acts as the environment and also provides a noisy record of system dynamics. The measurement record can then be used in a feedback scheme, opening the door to real time control of quantum gases. In this talk I discuss our theoretical proposal to use weak measurement and feedback to engineer new phases in spin1/2 BoseEinstein condensates. We show that measurement and feedback alters the effective Hamiltonian governing system dynamics, thereby driving phase transitions reminiscent of a quantum quench for the closed system. We also develop a feedback cooling protocol which prevents runaway heating of the condensate due to measurement backaction. Our results show that measurement and feedback can alter condensate dynamics in a stable, controllable manner and provides a route toward Hamiltonian engineering in manybody systems. Finally, I will discuss ongoing experimental work to realize our proposal using Rb87. Speaker Bio: Hilary Hurst received her BS in Engineering Physics from the Colorado School of Mines. She went on to earn a Masters in Theoretical Physics at the University of Cambridge and received her PhD in physics from the University of Maryland. She is currently an NRC Postdoctoral Fellow at NIST and the Joint Quantum Institute and will be joining the faculty at San Jose State University in the Fall. Her areas of research include quantum measurement and feedback control for manybody systems and magnetization dynamics in dissipative systems. 
Justin Johnson, National Renewable Energy LabMolecular approaches to robust qubits: theory, structures, and spectroscopyThe versatility of chemical substitution provides nearly infinite space for controlling energy levels and electronic/spin population flow in conjugated organic molecules, and as such, excitedstate molecular systems may lend themselves robust qubits with unique properties. We have chosen to investigate the spin states of triplet exciton pairs that are generated quickly upon photoexcitation of tailored molecules and appear to be protected from decoherence even at room temperature until decay to the ground state on a microsecond timescale. Strong spin polarization seems inherent in some of these systems, as detected through the distinct pattern of microwave absorption in a static magnetic field (i.e., EPR spectra). Furthermore, some molecules produce photon emission that is dependent on the exact spin state, much like nitrogen vacancy in diamond systems where magnetic resonance is detected optically. We are a building a library of molecules that can be coupled to each other with tunable strengths and geometries in order to understand the fundamental properties of spinentangled triplet pairs, and more incisively to evaluate whether or not there might be inherent advantages of this approach, especially in terms of sensitivity to noise, compared with more conventional open quantum systems. This is an early stage and focused effort, but we hope to make connections to other work to uncover synergies or extensions of our ideas and capabilities that impact QIS more broadly.
Speaker Bio: Justin Johnson has been a senior scientist at the National Renewable Energy Laboratory (NREL) since 2008 and is also a joint appointee in Chemistry at Colorado School of Mines. He received his Ph.D. in Chemistry from the University of California, Berkeley, in 2004 and subsequently did postdoctoral work with Dr. Arthur Nozik at NREL and Prof. Josef Michl at the University of Colorado, Boulder. His technical expertise is in ultrafast and nonlinear spectroscopy, and his research interests include investigating the dynamics of photophysical phenomena associated with solar light harvesting, energy storage, and quantum information in both molecular and nanoscale semiconductor systems. 
Eliot Kapit, Colorado School of MinesNoisetolerant quantum speedups in quantum annealing without fine tuningQuantum annealing is a powerful alternative model for quantum computing, which can succeed in the presence of environmental noise even without error correction. However, despite great effort, no conclusive proof of a quantum speedup (relative to state of the art classical algorithms) has been shown for these systems, and rigorous theoretical proofs of a quantum advantage generally rely on exponential precision in at least some aspects of the system, an unphysical resource guaranteed to be scrambled by random noise. In this work, we propose a new variant of quantum annealing, called RFQA, which can maintain a scalable quantum speedup in the face of noise and modest control precision. Specifically, we consider a modification of flux qubitbased quantum annealing which includes random, but coherent, lowfrequency oscillations in the directions of the transverse field terms as the system evolves. We show that this method produces a quantum speedup for finding ground states in the Grover problem and quantum random energy model, and thus should be widely applicable to other hard optimization problems which can be formulated as quantum spin glasses. Further, we show that this speedup should be resilient to two realistic noise channels (1⁄_{f}like local potential fluctuations and local heating from interaction with a finite temperature bath), and that another noise channel, bathassisted quantum phase transitions, actually accelerates the algorithm and may outweigh the negative effects of the others. The modifications we consider have a straightforward experimental implementation and could be explored with current technology.
Speaker Bio: Eliot Kapit receieved his PhD from Cornell in 2012. From there, he did postdocs at Oxford and the City University of New York, before starting as an Assistant Professor of Physics at Tulane University from 20152018. In summer 2018, he joined the faculty of Colorado School of Mines. His research focuses on quantum information, manybody physics, and novel superconducting circuits. 
Pauli Kehayias, Sandia National LabMagnetic sensing using nitrogenvacancy centers in diamondNitrogenvacancy (NV) centers in diamond have gained much recent interest for their uses in magnetic sensing and quantum information. NV centers are fluorescent defect centers that have discrete electronic states with fewmillisecond lifetimes, can be optically initialized and read out, are magnetically sensitive, and work in ambient conditions or extreme environments. Furthermore, our ability to place NV centers near the diamond surface (as close as a few nanometers) enables us to have a small separation between the NVs and external magnetic field sources, allowing us to sense external sources with high spatial resolution and sensitivity. After introducing NV DC and AC magnetometry techniques, I will present some ongoing NV magnetic sensing applications, including smallvolume NMR spectroscopy, magnetometry and pressure sensing in a diamond anvil cell, and magnetic microscopy for geology, biology, and condensedmatter physics.
Speaker Bio: Pauli did his PhD work at UC Berkeley, after which he was a postdoc at Harvard. Currently he is a Truman Fellowship postdoc at Sandia National Labs. He works on magnetic sensing and imaging with nitrogenvacancy centers in diamond, with applications in NMR spectroscopy, paleomagnetism, biomagnetism, and magnetic materials. 
Rupert Lewis, Sandia National LabReversible Superconducting Logic for Low Power ComputationReversible computing is the ultimate low energy computing technology. To be reversible, a computational operation must not only be able to run forward or backward but must preserve the energy of a bit. In practice, performing logic operations at or below the Landauer limit of kBT ln2 per logical operation is the goal of the field.
Superconducting circuits are the perfect technology for implementing ballistic reversible circuits due to inherently low losses and the use of single flux quanta as robust bits. I will discuss our progress towards an asynchronous ballistic reversible logic based on fluxons propagating along superconducting lines and incorporating Josephson junctions as active elements.
While superconducting logic families have the longterm potential of transforming high performance computing such as data centers, in the near term, the greatest impact is likely to be on quantum computers where the low energy dissipation (relative to transistorized logic) will enable in cryostat control of quantum computers. Funding Statement: Supported by the LDRD program at SNL, a multimission laboratory managed and operated by NTESS, LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. DOEs NNSA under contract DENA0003525.
Speaker Bio: Rupert Lewis received his PhD from Indiana University in 2001. He completed postdocs at the National High Magnetic Field Lab (in Tallahassee) and at the the University of Maryland where he worked on such diverse subjects as Wigner crystalization of 2D electron systems and superconducting implementations of quantum computing. Recently, he's branched out into reversible computing. He's been a staff member at Sandia since 2013. 
TzuMing Lu, Sandia National LabHole spins in Ge/GeSi heterostructuresThere is growing interest in leveraging the unique properties of holecarrier systems and their intrinsically strong spinorbit coupling to engineer novel qubits. For example, qubit controls using electric dipole spin resonance have recently been demonstrated in Ge/GeSi hole quantum dots. In this talk, we will present unique physical properties of holes in Ge/GeSi heterostructures as well as our ongoing efforts toward hole spin qubits, including development of gated device architectures, charge sensing, and magnetospectroscopy in the fewhole regime. We will also present our theoretical understanding and modeling of electric dipole spin resonance of holes in Ge quantum dots through intrinsic spinorbit coupling. An effective twolevel Hamiltonian for the spin of an individual hole is derived from the strain of the heterostructure and electrostatic potential, allowing for predictions on how the spin will respond to applied AC fields.
Acknowledgements:
This work was funded, in part, by the Laboratory Directed Research and Development Program and performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the US Department of Energy's National Nuclear Security Administration under contract DENA0003525. The views expressed in this article do not necessarily represent the views of the US Department of Energy or the United States Government. The work at NTU was supported by the Ministry of Science and Technology (10726228002018).
Speaker Bio: TzuMing Lu received his B.S. from National Taiwan University in 2004 and Ph.D. from Princeton University in 2011. After graduate school, he was a postdoctoral researcher at Sandia National Laboratories, New Mexico, where he is currently a Senior Member of Technical Staff. His research topics include semiconductor device physics, spinorbit coupling in solidstate systems, and quantum behavior of nanoscale structures. He is also a Center for Integrated Nanotechnologies (CINT) scientist, supporting user projects on quantum information science and solidstate physics at the nanoscale. 
Theresa Lynn, Harvey Mudd CollegeQuantum Secrets: Protecting Them in the Laboratory, Unraveling Them in the ClassroomI report on aspects of quantum education at Harvey Mudd beyond the quantum mechanics course sequence for physics majors. In upperlevel physics labs, for example, entangled photon experiments allow direct experimental investigation of phenomena central to quantum information, while NMR experiments give students valuable exposure to working with pulse sequences and the language of coherence times. In introductory courses, principles of quantum mechanics have been presented in the contexts of quantum optics and of materials science at both the firstsemester and sophomore levels. And outside the major, our undergraduate quantum information course relies on linear algebra but minimal background in physics, and regularly enrolls the majority of its students from outside the physics major (chiefly computer science and math majors). Time permitting, I will supplement this overview of quantum education at Harvey Mudd with some recent undergraduate research in my quantum optics group, where our work focuses on nonideal situations involving entanglement. In one project, we measure photon pairs partially entangled in polarization to show that certain partially entangled states have a surprising oneway feature in the way that measurements on one particle nonclassically alter the measurement statistics of the second (EPR steering). In another project, we have established several limits on how well nonentangling measurements can perform generalized Bell measurements on entangled states more complex than the twoqubit case; these limits are relevant to recent and nearterm experimental realizations of quantum teleportation and dense coding protocols.
Speaker Bio: Theresa Lynn received her B.A. in physics from Harvard and did her Ph.D. at Caltech doing experimental quantum optics and atomic physics. After working as a postdoc and staff scientist at Caltech in educational outreach and nuclear astrophysics, Theresa returned to AMO physics when she took a faculty position at Harvey Mudd College, where she has been since 2006. Her current research areas are quantum optics and fundamentals of quantum mechanics. Since 2014 she has taught an introductory quantum information course to an audience of physics and other STEM majors. 
Corey Rae McRea, National Institute of Standards and TechnologyThe Boulder Cryogenic Quantum TestbedThe investigation of materials losses at low powers and temperatures has been identified as critical for increasing performance and scalability of superconducting quantum computers. This investigation requires the dissemination of a community standard for the accurate and repeatable measurement and analysis of superconducting microwave resonators. JILA / CU’s Boulder Cryogenic Quantum Testbed (CQT) is a nonprofit, precompetitive research facility for developing and openly disseminating standard protocols to reproducibly measure the quality factor and performance characteristics of superconducting microwave resonators used in quantum computing circuits. The testbed was founded on a philosophy of open collaborative science by a joint initiative between government, academic, and industry partners.
Speaker Bio: Corey Rae McRae received her PhD in Quantum Information from the University of Waterloo in 2018. She is now a postdoctoral researcher at the National Institute of Standards and Technology Boulder, as well as the director of the Boulder Cryogenic Quantum Testbed at JILA, University of Colorado Boulder. She studies materials losses in superconducting quantum circuits as well as the behavior and performance of superconducting microwave resonators. 
Xiao Mi, GoogleQuantum supremacy using a programmable superconducting processorThe promise of quantum computers is that certain computational tasks might be executed exponentially faster on a quantum processor than on a classical processor. A fundamental challenge is to build a highfidelity processor capable of running quantum algorithms in an exponentially large computational space. Here we report the use of a processor with programmable superconducting qubits to create quantum states on 53 qubits, corresponding to a computational statespace of dimension 2^{53} (about 10^{16}). Measurements from repeated experiments sample the resulting probability distribution, which we verify using classical simulations. Our Sycamore processor takes about 200 seconds to sample one instance of a quantum circuit a million timesour benchmarks currently indicate that the equivalent task for a stateoftheart classical supercomputer would take approximately 10,000 years. This dramatic increase in speed compared to all known classical algorithms is an experimental realization of quantum supremacy for this specific computational task, heralding a muchanticipated computing paradigm.
Speaker Bio: Xiao Mi is an experimental physicst at Google working on quantum gate metrology and applications of nearterm quantum processors to condensed matter physics problems. Prior to joing Google, Xiao pioneered the integration of circuit quantum electrodynamics with semiconductor spin qubits during his PhD at Princeton. He is the recipient of the 2020 Richard Greene Condensed Matter Thesis Prize from the American Physical Society. 
Kater Murch, Washington UniversitySuperconducting quantum circuits: exploring frontiers of quantum measurement and dissipation at microwave frequenciesSuperconducting quantum circuits: exploring frontiers of quantum measurement and dissipation at microwave frequencies
The combination of coherent quantum bits, robust single qubit control, and quantum noise limited parametric amplifiers has yielded an unprecedented view into the physics of quantum measurement and quantum dissipation. I will survey a range of research topics that are currently open to experimental exploration with this platform, including weak measurement and quantum trajectories, nonMarkovian dynamics, effective nonHermitian dynamics, quantum thermodynamics, and quantum sensing. Speaker Bio: Kater Murch received his PhD in physics in 2008 from the University of California, Berkeley, with disseration research focusing on cold atom cavity QED and measurement backaction. His postdoctoral work at UC Berkeley focused on superconducting quantum circuits and quantum measurement. Since 2014, he has been at Washington University in St. Louis with work focusing on open quantum systems experiment with superconducting circuits. Kater has received an Alfred P. Sloan fellowship, an NSF CAREER award, and a Cottrell Scholar award. 
Richard T. Scalettar, University of California DavisQuantum Simulation Studies of Charge Patterns in FermiBose SystemsQuantum Simulation Studies of Charge Patterns in FermiBose Systems
The Holstein Model describes the interaction between fermions and a collection of local (dispersionless) phonon modes, and has intimate connections to the attractive Hubbard Hamiltonian. In the dilute limit, the phonon degrees of freedom dress the fermions, giving rise to polaron and bipolaron formation. At higher densities, the phonons mediate collective superconducting (SC) and charge density wave (CDW) phases. I will review the basic physics of the Holstein model and show results of some recent Quantum Monte Carlo (QMC) simulations where we have determined the quantum critical point and finite temperature transition points of the Holstein model on a honeycomb lattice, and also on the role of phonon dispersion on SC and CDW order. I will conclude the presentation by discussing a new, Langevinbased, algorithm which might allow connections to cold atom quantum simulators of BoseFermi mixtures. Speaker Bio: Richard Scalettar received his PhD in physics in 1986 from the University of California, Santa Barbara. In 1989, after a postdoc in the Chemistry Department at the University of Illinois, UrbanaChampaign, he joined the Physics faculty at the University of California, Davis. Prof. Scalettar's research is in the application of Quantum Monte Carlo methods to problems in quantum magnetism, superconductivity, and localization. He was elected Fellow of the American Physical Society in 2004, and served as chair of the APS Division of Computational Physics in 2010. In 2009, he received the Chancellor's Outstanding Undergraduate Mentor Award at UC Davis, and in 2014 was named as an outstanding referee of the American Physical Society. 
Raymond Simmonds, National Institute of Standards and TechnologyManipulating mechanical and electrical quanta with parametric circuitsParametric processes are ubiquitous in nature.
At their heart is an interaction that involves a nonlinear relationship between changing quantities. These processes can lead to energy transport in different forms. One form produces amplification, like the well known example of a child on a swing who periodically changes her center of gravity causing the resonance frequency of the swing to be modulated, inducing more swinging. Here, energy from her pumping legs at one frequency is absorbed and transferred into more motion at a different swinging frequency. This type of phenomenon can be mechanical (as with a swing) or electrical in nature, lending itself to many useful technological applications.
Parametric processes are paramount for new emerging quantum information technologies like lasercooled trapped ions, linear quantum optics, or optomechanics. Analogous physical systems can be created on a single chip using superconducting circuits, along with nonlinear Josephson junctions, or metalized flexible membrane capacitors. In this talk, I will discuss our experimental efforts at NIST to utilize parametric interactions to help control different physical processes that are important manipulating quantum information. Harnessing these processes onchip with superconducting circuit components, including microdrum mechanical resonators, electromagnetic cavity modes, and superconducting quantum bits provides a highly programmable platform for engineering both closed and open quantum systems for simulation or computation.
Speaker Bio: Ray Simmonds received his BA, MA, and PhD from the University of California, Berkeley in 2002, where he studied Quantum Interfrence in superfluid He3. After a 2 year postdoc at NIST in Boulder CO developing superconducting quantum bits, he became a staff physicist. His current research is focused on the application of superconducting microwave and optomechanical circuit techniques for quantum information, measurement, and computing. 
Timur Tscherbul, University of Nevada RenoQuantum coherence from thermal noise: From coherent dynamics to nonequilibrium steady statesQuantum coherence from thermal noise: From coherent dynamics to nonequilibrium steady states
Quantum coherence is widely regarded as an essential resource for quantum information processing and quantum sensing. In this talk, I will present an overview of our recent work on the quantum dynamics of noiseinduced Fano coherences that occur in multilevel quantum systems interacting with a thermal bath (such as blackbody radiation) in the absence of coherent driving. By solving the nonsecular BlochRedfield quantum master equation for a model threelevel Vsystem driven by a thermal bath, we show that Fano coherences exhibit quantum beats when the spacing between the excited states of the Vsystem is large compared to the radiative decay rates. In the opposite limit of small excitedstate spacing, we observe the emergence of nonequilibrium quasisteady states, which become true nonequilibrium steady states if the thermal driving is polarized. The general theory will be illustrated with two examples involving the time evolution of Fano coherences in Rydberg atoms immersed in blackbody radiation and the breaking of detailed balance in atomic calcium driven by polarized incoherent light. Implications of these results for quantum information processing and quantum thermodynamics will be discussed. Speaker Bio: Tscherbul Timur earned his PhD from Moscow State University, and received a Killam postdoctoral fellowship at the University of British Columbia. He joined the faculty at the University of Nevada, Reno in 2015 after working as a postdoc at Harvard and the University of Toronto. He is a computational quantum physisist interested in the theory of open quantum systems, quantum dynamics and control of complex atomic and molecular systems, quantum impurity problems, and diagrammatic Monte Carlo methods. 
Zhexuan Gong, Colorado School of MinesSpeed limit of entangling gates in quantum computers: Theory and Experiment.Fast twoqubit entangling gates are essential for quantum computers with finite coherence times. Due to the limit of interaction strength among qubits, there exists a theoretical speed limit for a given twoqubit entangling gate. This speed limit has been explicitly found only for a twoqubit system and under the assumption of negligible single qubit gate time. We propose to demonstrate such speed limit experimentally using two superconducting transmon qubits with an alwayson capacitive coupling. Moreover, we investigate a modified speed limit when single qubit gate time is not negligible, as in any practical experimental setup. Finally, we study the generalization to multiple qubit systems where the coupling to additional qubits can significantly increase the speed limit of a twoqubit entangling gate, thus requiring the codesign of the quantum computer from both theorists and experimentalists for optimal gate performance.
Speaker Bio: Zhexuan Gong received his PhD in Physics from the University of Michigan in 2013. He was then a postdoctoral research associate and research scientist at the Joint Quantum Institute, University of Maryland and NIST. He joined Mines in 2018 as an assistant professor and also holds a NIST associate position. His areas of research include quantum computing, quantum information theory, and quantum manybody physics. 
Poster Session
Name  Inst  Poster Title 

Kirsten Blagg  Mines  Thermoelectric effects in Superconductor Ferromagnetic Hybrids 
Jacob Cutshall  Reed  A New Form of Quantum Tomography 
Mina Fasihi  Mines  Complex network description of phase transitions in the classical and quantum disordered Ising Model 
Patrick Harrington  Wash U.  Photonic transport in quantum metamaterials 
Joel Howard  Mines  Investigating Entanglement Rates of Coupled Superconducting Qubits 
Matthew Jones  Mines  Open Source Matrix Product States: A Simulation Platform for Quantum Computing Technologies 
Eric Jones  Mines  Variational preparation of quantum Hall states on a lattice 
Sarah Jones  Mines  Effects of Nanoparticle Size and Density on Vortex Creep in (Y,Gd)BCO Films 
Daria Kowsari  Wash U.  Memory in nonMarkovian Open Quantum Systems 
Suyesh Koyu  UNR  Quantum Coherent Dynamics from Thermal Noise: A Threelevel Vsystem Driven by Incoherent Radiation 
Alex Lidiak  Mines  Quantum State Compression and Analysis via Dimensionality Reduction 
Brad Lloyd  Mines  Quantum Dots in Silicon as a Candidate Platform for Scalable Quantum Computing and Quantum Neuromorphic Devices 
Nick Materise  Mines  Quantum Heat Engine Simulated on Superconducting Qubits 
David Rodriguez Perez  Mines  Variable Dissipation in Small Logical Qubits 
Zhijie Tang  Mines  Theoretical survey of unconventional quantum annealing methods applied to a difficult trial problem 
Brooks Venuti  Mines  Probing Magnetic Skyrmions in the Presence of Disorder 
Joshua Lewis  Mines  Fractional Calculus in the Analysis of Quantum Systems 
Organizers
Attendees
Name  Institution 

Adams, Daniel  Colorado School of Mines 
Alberi, Kirstin  National Renewable Energy Laboratory 
Alrumaih, Amani  Colorado School of Mines 
Bachman, Kate  Colorado School of Mines 
Bauers, Sage  National Renewable Energy Laboratory 
Beard, Matt  National Renewable Energy Laboratory 
Beck, Mark  Reed College 
Becker, Dylon  Colorado School of Mines 
Been, Joel  Colorado School of Mines 
Bielejec, Edward  Sandia National Lab 
Blagg, Kirsten  Colorado School of Mines 
Brennecka, Geoff  Colorado School of Mines 
Breznay, Nicholas  Harvey Mudd College 
Brooks, Jeremy  Colorado School of Mines 
Brown, Kirsten  Colorado School of Mines 
Bruce, Kane  Colorado School of Mines 
Bush, Brian  National Renewable Energy Laboratory 
Carr, Lincoln  Colorado School of Mines 
Chen, Xiaowen  National Renewable Energy Laboratory 
Chen, Xihan  National Renewable Energy Laboratory 
Cole, Haley  Colorado School of Mines 
Collins, Reuben  Colorado School of Mines 
Cutshall, Jacob  Reed College 
DeMott, Roswell  Colorado School of Mines 
DeWolfMoura, Tyjal  Colorado School of Mines 
Downie, Khloe  Colorado School of Mines 
Eley, Serena  Colorado School of Mines 
Fasihi, Mina  Colorado School of Mines 
Fearing, Steven  Colorado School of Mines 
Ferguson, Andrew  National Renewable Energy Laboratory 
Giddins, Heather  Colorado School of Mines 
Godfrey, Christian  Colorado School of Mines 
Gong, Zhexuan  Colorado School of Mines 
Gorman, Brian  Colorado School of Mines 
Haack, Casey  Colorado School of Mines 
Halaoui, Adam  The University of Denver 
Harrington, Patrick  Washington University St. Louis 
Honors, Dylan  Colorado School of Mines 
Howard, Joel  Colorado School of Mines 
Hurst, Hilary  Joint Quantum Institute/San Jose State University 
Iverson, Gabriel  Joint Quantum Institute/San Jose State University 
Jameson, Casey  Colorado School of Mines 
Johnson, Justin  National Renewable Energy Laboratory 
Jones, Eric  Colorado School of Mines 
Jones, Matthew  Colorado School of Mines 
Jones, Sarah  Colorado School of Mines 
Kapit, Eliot  Colorado School of Mines 
Kehyias, Pauli  Sandia National Lab 
Kelly, Brian  Colorado School of Mines 
Khatami, Ehsan  San Jose State University 
Kowsari, Daria  Washington University St. Louis 
Koyu, Suyesh  University of Nevada Reno 
Kuklin, Jackson  Colorado School of Mines 
Kumar, Nitin  Colorado School of Mines 
Lewis, Josh  Colorado School of Mines 
Lewis, Rupert  Sandia National Lab 
Lidiak, Alexander  Colorado School of Mines 
Lloyd, Bradley  Colorado School of Mines 
Lu, TzuMing  Sandia National Lab 
Luhman, Dwight  Sandia National Lab 
Lusk, Mark  Colorado School of Mines 
Lynn, Theresa  Harvey Mudd College 
Materise, Nick  Colorado School of Mines 
Matlock, Charles  Colorado School of Mines 
McKinsey, Joseph  Colorado School of Mines 
McMullen, Skyler  Colorado School of Mines 
McPherson, Alexandria  Colorado School of Mines 
McRae, Corey Rae  National Institute of Standards and Technology 
Mi, Xiao  
Mikulich, Alexander  Colorado School of Mines 
Mohammad, Majid  Colorado School of Mines 
Monaghan, Austin  Colorado School of Mines 
Moses, Joshua  Colorado School of Mines 
Murch, Kater  Washington University St. Louis 
Niyonkuru, Paul  Colorado School of Mines 
Osella, Anna  National Renewable Energy Laboratory 
Parrott, Zachary  Colorado School of Mines 
Paver, Brendan  Colorado School of Mines 
QuispeFlores, Carla  Colorado School of Mines 
Ramos De Oliveira, Jona  Colorado School of Mines 
Riddle, Sam  Colorado School of Mines 
Rodriguez Perez, David  Colorado School of Mines 
Sanders, Caleb  Colorado School of Mines 
Scalettar, Richard  University of California Davis 
Schenken, William  Colorado School of Mines 
Schroeter, Darrell  Reed College 
Selinger, Alan  Colorado School of Mines 
Simmonds, Ray  National Institute of Standards and Technology 
Singh, Meenakshi  Colorado School of Mines 
Smith, Connor  Colorado School of Mines 
Soto Ramos de Oliveira, Jonatan  Soto Ramos de Oliveira 
Stone, Chuck  Colorado School of Mines 
Supple, Edwin  Colorado School of Mines 
Swirtz, Madison  Colorado School of Mines 
Tang, Zhije  Colorado School of Mines 
Tavenner, Jacob  Colorado School of Mines 
Tellez Gonzalez, Jaime  Colorado School of Mines 
Torres, Andrew  University of Denver 
Tscherbul, Timur  University of Nevada Reno 
Varosy, Paul  Colorado School of Mines 
Venuti, Brooks  Colorado School of Mines 
Wagner, Taylor  Colorado School of Mines 
Walden, Michael  Colorado School of Mines 
Wiesner, Laura  Colorado School of Mines 
Willner, Jackson  Colorado School of Mines 
Wilson, Alexander  Colorado School of Mines 
Wu, David  Colorado School of Mines 
Zabrocky, Mallory  Colorado School of Mines 
Ziyad, Jalan  Reed College 
Lodging and Travel
Workshop lodging will be at Table Mountain Inn and can be arranged through us at quantum@mines.edu.
Plane tickets will be reimbursed for workshop participants coming from outside Colorado, and confirmed speakers or participants should go ahead and purchase those. Please double check with us at quantum@mines.edu if your cost is over $400.
For getting to Golden, we recommend the easy and reliable lightrail system that leaves directly from the airport:
RTD rail system, Rail System Map
Take the A train from the airport to Union station at the end of the A line. Then transfer to the W train and ride it to the end of the W line in Golden. There is a small bus every 15 minutes that takes you straight downtown from there.
Uber and Lyft are about $6080 one way. A taxi will cost around $100+. Other alternatives include:
Denvers Airport Transportation
Transit Van Shuttle