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Quantum engine based on many-body localization

Yunger Halpern, Nicole and White, Christopher David and Gopalakrishnan, Sarang and Refael, Gil (2019) Quantum engine based on many-body localization. Physical Review B, 99 (2). Art. No. 024203. ISSN 2469-9950. doi:10.1103/PhysRevB.99.024203.

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Many-body-localized (MBL) systems do not thermalize under their intrinsic dynamics. The athermality of MBL, we propose, can be harnessed for thermodynamic tasks. We illustrate this ability by formulating an Otto engine cycle for a quantum many-body system. The system is ramped between a strongly localized MBL regime and a thermal (or weakly localized) regime. The difference between the energy-level correlations of MBL systems and of thermal systems enables mesoscale engines to run in parallel in the thermodynamic limit, enhances the engine's reliability, and suppresses worst-case trials. We estimate analytically and calculate numerically the engine's efficiency and per-cycle power. The efficiency mirrors the efficiency of the conventional thermodynamic Otto engine. The per-cycle power scales linearly with the system size and inverse-exponentially with a localization length. This work introduces a thermodynamic lens onto MBL, which, having been studied much recently, can now be considered for use in thermodynamic tasks.

Item Type:Article
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URLURL TypeDescription Paper InPhysics: Synopsis
Yunger Halpern, Nicole0000-0001-8670-6212
Alternate Title:MBL-mobile: Many-body-localized engine
Additional Information:© 2019 American Physical Society. Received 25 July 2017; revised manuscript received 17 December 2018; published 22 January 2019. This research was supported by NSF grant PHY-0803371. The Institute for Quantum Information and Matter (IQIM) is an NSF Physics Frontiers Center supported by the Gordon and Betty Moore Foundation. N.Y.H. is grateful for partial support from the Walter Burke Institute for Theoretical Physics at Caltech and for a Barbara Groce Graduate Fellowship. This material is based on work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1144469. S.G. acknowledges support from the Walter Burke Foundation and from the NSF under Grant No. DMR-1653271. G.R. acknowledges support from the David and Lucile Packard Foundation. N.Y.H. thanks Nana Liu and Álvaro Martín Alhambra for discussions.
Group:Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
Barbara Groce Graduate Fellowship, CaltechUNSPECIFIED
NSF Graduate Research FellowshipDGE-1144469
David and Lucile Packard FoundationUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20171004-143754557
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82075
Deposited By: Joy Painter
Deposited On:05 Oct 2017 17:01
Last Modified:15 Nov 2021 19:48

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