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What survives of many-body localization in the presence of dissipation | | Emanuele Levi
; Markus Heyl
; Igor Lesanovsky
; Juan P. Garrahan
; | | Date: |
15 Oct 2015 | | Abstract: | Many-body localization (MBL) has emerged as a novel paradigm for robust
ergodicity breaking in closed quantum many-body systems. However, it is not yet
clear to which extent MBL survives in the expected presence of dissipative
processes induced by the coupling to environments. Here we study heating and
ergodicity for a paradigmatic MBL system---an interacting fermionic chain
subject to disorder---in the presence of dephasing. We find that, even though
the system is eventually driven into an infinite-temperature state, heating as
monitored by the von Neumann entropy can progress logarithmically slowly,
implying exponentially large time scales for relaxation. This slow loss of
memory of initial conditions make signatures of non-ergodicity visible over a
long, but transient, time regime. We point out a potential controlled
realization of the considered setup with cold atomic gases held in optical
lattices. | | Source: | arXiv, 1510.4634 | | Services: | Forum | Review | PDF | Favorites | |
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