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Partial breakdown of quantum thermalization in a Hubbard-like model

Garrison, James R. and Mishmash, Ryan V. and Fisher, Matthew P. A. (2017) Partial breakdown of quantum thermalization in a Hubbard-like model. Physical Review B, 95 (5). Art. No. 054204. ISSN 2469-9950. doi:10.1103/PhysRevB.95.054204.

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We study the possible breakdown of quantum thermalization in a model of itinerant electrons on a one-dimensional chain without disorder, with both spin and charge degrees of freedom. The eigenstates of this model exhibit peculiar properties in the entanglement entropy, the apparent scaling of which is modified from a “volume law” to an “area law” after performing a partial, site-wise measurement on the system. These properties and others suggest that this model realizes a new, nonthermal phase of matter, known as a quantum disentangled liquid (QDL). The putative existence of this phase has striking implications for the foundations of quantum statistical mechanics.

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Additional Information:© 2017 American Physical Society. (Received 7 August 2016; revised manuscript received 19 January 2017; published 17 February 2017) We are grateful to Leon Balents, Bela Bauer, Erez Berg, Dominic Else, Fabian Essler, Keith Fratus, Steven Girvin, Tarun Grover, Katharine Hyatt, Robert Konik, Cheng-Ju Lin, Lesik Motrunich, Markus Müller, Chetan Nayak, Gil Refael, Sid Parameswaran, Neil Robinson, Mauro Schiulaz, Thomas Veness, and David Weld for enlightening discussions regarding this work. This research was supported in part by the National Science Foundation, under Grant No. DMR-14-04230 (J.R.G. and M.P.A.F.), by the Walter Burke Institute for Theoretical Physics at Caltech (R.V.M.), and by the Caltech Institute of Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation. We acknowledge support from the Center for Scientific Computing at the CNSI and MRL: an NSF MRSEC (DMR-1121053) and NSF CNS-0960316.
Group:Walter Burke Institute for Theoretical Physics, Institute for Quantum Information and Matter
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Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Center for Scientific ComputingUNSPECIFIED
Issue or Number:5
Record Number:CaltechAUTHORS:20170221-134248509
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Official Citation:Partial breakdown of quantum thermalization in a Hubbard-like model James R. Garrison, Ryan V. Mishmash, and Matthew P. A. Fisher Phys. Rev. B 95, 054204
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74433
Deposited By: George Porter
Deposited On:21 Feb 2017 22:10
Last Modified:11 Nov 2021 05:27

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