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Title: Extension of the eigenstate thermalization hypothesis to nonequilibrium steady states

Journal Article · · Physical Review B
 [1];  [2];  [3];  [1]
  1. Princeton Univ., NJ (United States)
  2. Princeton Univ., NJ (United States); Univ. of California, Santa Barbara, CA (United States)
  3. Univ. of California at San Diego, La Jolla, CA (United States)

We extend the notion of the eigenstate thermalization hypothesis (ETH) to open quantum systems governed by the Gorini-Kossakowski-Lindblad-Sudarshan (GKLS) master equation. We present evidence that the eigenstates of nonequilibrium steady-state (NESS) density matrices obey a generalization of ETH in boundary-driven systems when the bulk Hamiltonian is nonintegrable, just as eigenstates of Gibbs density matrices are conjectured to do in equilibrium. Furthermore, this generalized ETH, which we call NESS ETH, can be used to obtain representative pure states that reproduce the expectation values of few-body operators in the NESS. The density matrices of these representative pure states can be further interpreted as weak solutions of the GKLS master equation. Additionally, we explore the validity and breakdown of NESS-ETH in the presence of symmetries, integrability, and many-body localization in the bulk Hamiltonian.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0016244
OSTI ID:
1612442
Alternate ID(s):
OSTI ID: 1546453
Journal Information:
Physical Review B, Vol. 100, Issue 4; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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