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Entanglement in nonequilibrium steady states and many-body localization breakdown in a current-driven system

Panda, A and Banerjee, S (2020) Entanglement in nonequilibrium steady states and many-body localization breakdown in a current-driven system. In: Physical Review B, 101 (18).

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Official URL: https://doi.org/10.1103/PhysRevB.101.184201

Abstract

We model a one-dimensional current-driven interacting disordered system through a non-Hermitian Hamiltonian with asymmetric hopping and study the entanglement properties of its eigenstates. In particular, we investigate whether a many-body localizable system undergoes a transition to a current-carrying nonequilibrium steady state under the drive and how the entanglement properties of the quantum states change across the transition. We also discuss the dynamics, entanglement growth, and long-time fate of a generic initial state under an appropriate time evolution of the system governed by the non-Hermitian Hamiltonian. Our study reveals rich entanglement structures of the eigenstates of the non-Hermitian Hamiltonian. We find transition between current-carrying states with volume-law to area-law entanglement entropy, as a function of disorder and the strength of the non-Hermitian term. © 2020 American Physical Society.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: The Copyright for this article belongs American Physical Society
Keywords: Hamiltonians, Current-driven; Disordered system; Entanglement entropy; Entanglement properties; Non-equilibrium steady state; Non-Hermitian Hamiltonians; Quantum state; Time evolutions, Quantum entanglement
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 05 Nov 2021 09:16
Last Modified: 05 Nov 2021 09:16
URI: http://eprints.iisc.ac.in/id/eprint/65862

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