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Title: Engineered thermalization and cooling of quantum many-body systems

Abstract

We develop a scheme for engineering genuine thermal states in analog quantum simulation platforms by coupling local degrees of freedom to driven, dissipative ancilla pseudospins. We demonstrate the scheme in a many-body quantum spin lattice simulation setting. A Born-Markov master equation describing the dynamics of the many-body system is developed, and we show that if the ancilla energies are periodically modulated, with a carefully chosen hierarchy of timescales, one can effectively thermalize the many-body system. Through analysis of the time-dependent dynamical generator, we determine the conditions under which the true thermal state is an approximate dynamical fixed point for general system Hamiltonians. Finally, we evaluate the thermalization protocol through numerical simulation and discuss prospects for implementation on current quantum simulation hardware.

Authors:
ORCiD logo; ORCiD logo; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
OSTI Identifier:
1630789
Alternate Identifier(s):
OSTI ID: 1572863
Report Number(s):
arXiv:1909.02023v1
Journal ID: ISSN 2643-1564; PPRHAI; 023214
Grant/Contract Number:  
NA0003525; AC02-05CH11231
Resource Type:
Published Article
Journal Name:
Physical Review Research
Additional Journal Information:
Journal Name: Physical Review Research Journal Volume: 2 Journal Issue: 2; Journal ID: ISSN 2643-1564
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 74 ATOMIC AND MOLECULAR PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Metcalf, Mekena, Moussa, Jonathan E., de Jong, Wibe A., and Sarovar, Mohan. Engineered thermalization and cooling of quantum many-body systems. United States: N. p., 2020. Web. doi:10.1103/PhysRevResearch.2.023214.
Metcalf, Mekena, Moussa, Jonathan E., de Jong, Wibe A., & Sarovar, Mohan. Engineered thermalization and cooling of quantum many-body systems. United States. doi:https://doi.org/10.1103/PhysRevResearch.2.023214
Metcalf, Mekena, Moussa, Jonathan E., de Jong, Wibe A., and Sarovar, Mohan. Fri . "Engineered thermalization and cooling of quantum many-body systems". United States. doi:https://doi.org/10.1103/PhysRevResearch.2.023214.
@article{osti_1630789,
title = {Engineered thermalization and cooling of quantum many-body systems},
author = {Metcalf, Mekena and Moussa, Jonathan E. and de Jong, Wibe A. and Sarovar, Mohan},
abstractNote = {We develop a scheme for engineering genuine thermal states in analog quantum simulation platforms by coupling local degrees of freedom to driven, dissipative ancilla pseudospins. We demonstrate the scheme in a many-body quantum spin lattice simulation setting. A Born-Markov master equation describing the dynamics of the many-body system is developed, and we show that if the ancilla energies are periodically modulated, with a carefully chosen hierarchy of timescales, one can effectively thermalize the many-body system. Through analysis of the time-dependent dynamical generator, we determine the conditions under which the true thermal state is an approximate dynamical fixed point for general system Hamiltonians. Finally, we evaluate the thermalization protocol through numerical simulation and discuss prospects for implementation on current quantum simulation hardware.},
doi = {10.1103/PhysRevResearch.2.023214},
journal = {Physical Review Research},
number = 2,
volume = 2,
place = {United States},
year = {2020},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: https://doi.org/10.1103/PhysRevResearch.2.023214

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