James R. Garrison, Ph.D. — Joint Quantum Institute

Research overview

I am a theoretical physicist, working primarily in the field of quantum condensed matter physics. My research interests include the thermalization and dynamics of isolated quantum systems, zero-temperature phases of matter, and methods for simulating quantum mechanics on both classical and quantum hardware. One broad theme that unifies each of these areas is the central importance of quantum entanglement.

Education

Ph.D., Physics, University of California, Santa Barbara (2016)

M.A., Physics, University of California, Santa Barbara (2012)

B.S., Mathematics and Physics, Case Western Reserve University (2006)

B.A., History and Psychology, Case Western Reserve University (2006)

Recent publications

“Entanglement bounds on the performance of quantum computing architectures,” Zachary Eldredge, Leo Zhou, Aniruddha Bapat, James R. Garrison, Abhinav Deshpande, Frederic T. Chong, and Alexey V. Gorshkov, Phys. Rev. Research 2, 033316 (2020) [arXiv:1908.04802].
“Circuit complexity across a topological phase transition,” Fangli Liu, Seth Whitsitt, Jonathan B. Curtis, Rex Lundgren, Paraj Titum, Zhi-Cheng Yang, James R. Garrison, and Alexey V. Gorshkov, Phys. Rev. Research 2, 013323 (2020) [arXiv:1902.10720].
“Probing Ground-State Phase Transitions through Quench Dynamics,” Paraj Titum, Joseph T. Iosue, James R. Garrison, Alexey V. Gorshkov, and Zhe-Xuan Gong, Phys. Rev. Lett. 123, 115701 (2019) [arXiv:1809.06377].
“Locality and digital quantum simulation of power-law interactions,” Minh C. Tran, Andrew Y. Guo, Yuan Su, James R. Garrison, Zachary Eldredge, Michael Foss-Feig, Andrew M. Childs, Alexey V. Gorshkov, Phys. Rev. X 9, 031006 (2019) [arXiv:1808.05225].
“Scale-Invariant Continuous Entanglement Renormalization of a Chern Insulator,” Su-Kuan Chu, Guanyu Zhu, James R. Garrison, Zachary Eldredge, Ana Valdés Curiel, Przemyslaw Bienias, I. B. Spielman, and Alexey V. Gorshkov, Phys. Rev. Lett. 122, 120502 (2019) [arXiv:1807.11486].
“Unitary entanglement construction in hierarchical networks,” Aniruddha Bapat, Zachary Eldredge, James R. Garrison, Abhinav Desphande, Frederic T. Chong, and Alexey V. Gorshkov, Phys. Rev. A 98, 062328 (2018) [arXiv:1808.07876].
“Asymmetric Particle Transport and Light-Cone Dynamics Induced by Anyonic Statistics,” Fangli Liu, James R. Garrison, Dong-Ling Deng, Zhe-Xuan Gong, and Alexey V. Gorshkov, Phys. Rev. Lett. 121, 250404 (2018) [arXiv:1809.02614].
“Does a single eigenstate encode the full Hamiltonian?” James R. Garrison and Tarun Grover, Phys. Rev. X 8, 021026 (2018) [arXiv:1503.00729].
“Lieb-Robinson bounds on n-partite connected correlation functions,” Minh Cong Tran, James R. Garrison, Zhe-Xuan Gong, and Alexey V. Gorshkov, Phys. Rev. A 96, 052334 (2017) [arXiv:1705.04355].
“Extracting entanglement geometry from quantum states,” Katharine Hyatt, James R. Garrison, and Bela Bauer, Phys. Rev. Lett. 119, 140502 (2017) [arXiv:1704.01974].

Recent activities

Dynamics, criticality, and universality in random quantum circuits virtual workshop, September – October 2020.
JuliaCon, Baltimore MD, July 2019.
Aspen Center for Physics visit, July 2019.
TQC + NISQ conference, College Park MD, June 2019.
APS March Meeting, 2019 – “Zero-temperature properties of the long-range transverse-field Ising model on the triangular lattice” (abstract).
“Quantum Many-Body Entanglement and Simulation: Insights, Challenges and Opportunities,” University of Notre Dame, February 14, 2019.
“Quantum Many-Body Entanglement and Simulation: Insights, Challenges and Opportunities,” Flatiron Institute, February 12, 2019.
“Quantum Many-Body Entanglement and Simulation: Insights, Challenges and Opportunities,” New York University, February 11, 2019.
Software-Tailored Architecture for Quantum co-design (STAQ) kickoff meeting, Durham, NC, December 2018.
From Physics to Applications of Quantum Computers, Aspen Summer Workshop, May – June 2018.
Advances in Quantum Algorithms and Computation conference, Aspen CO, March 2018.
Frontiers of Quantum Information Physics conference, Santa Barbara CA, October 2017.
Workshop on Computational Complexity and High Energy Physics, College Park, MD, July – August 2017.
DAMOP 2017 – “Partial breakdown of quantum thermalization in a Hubbard-like model” (abstract), Sacramento, CA, June 2017.
Non-equilibrium Quantum Matter workshop, Mainz, Germany, May – June 2017.
APS March Meeting, 2017 – “Partial breakdown of quantum thermalization in a Hubbard-like model” (abstract).
Designer Quantum Systems Out of Equilibrium conference, Santa Barbara CA, November 2016.
Visit to Oxford, June 27 - July 1, 2016.
“Universal Aspects of Quantum Thermalization,” QuICS Seminar, University of Maryland, June 1, 2016.
Dissertation defense, UC Santa Barbara, May 19, 2016.
Advances in Quantum Algorithms and Computation conference, Aspen CO, March 2016.
APS March Meeting, 2016 – “Universal aspects of thermalization after a quantum quench” (abstract).
Non-equilibrium dynamics of stochastic and quantum integrable systems conference, Santa Barbara CA, February 2016.
“Universal Aspects of Quantum Thermalization,” Caltech, December 2, 2015.
“Universal Aspects of Quantum Thermalization,” University of Toronto, November 25, 2015.
“Universal Aspects of Quantum Thermalization,” Perimeter Institute, November 23, 2015.
“Universal Aspects of Quantum Thermalization,” Cornell University, November 12, 2015.
Non-Equilibrium Quantum Matter conference, Aspen CO, March 2015.
APS March Meeting, 2015 – “Does the eigenstate thermalization hypothesis hold for non-local operators?” (abstract).
Boulder Summer School, July 2014.
APS March Meeting, 2014 – “Entanglement properties after a partial measurement: a numerical study of excited states in Hubbard-like models” (abstract).
Beyond Quasiparticles: New Paradigms for Quantum Fluids conference, Aspen CO, January 2014.
“Modeling strongly correlated quantum phases using numerical methods: insights and progress” (department colloquium), Cal State LA, November 14, 2013.
Invited tutorial on DMRG (with R. V. Mishmash) (link), Quantum spin liquids summer school, Trieste, Italy, September 2013.