Dynamics and asymptotics of correlations in a many-body localized system

Steve Campbell, Matthew Power, Gabriele De Chiara

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
164 Downloads (Pure)

Abstract

We examine the dynamics of nearest-neighbor bipartite concurrence and total correlations in the spin-1/2 XXZ model with random fields. We show, starting from factorized random initial states, that the concurrence can suffer entanglement sudden death in the long time limit and therefore may not be a useful indicator of the properties of the system. In contrast, we show that the total correlations capture the dynamics more succinctly, and further reveal a fundamental difference in the dynamics governed by the ergodic versus many-body localized phases, with the latter exhibiting dynamical oscillations. Finally, we consider an initial state composed of several singlet pairs and show that by fixing the correlation properties, while the dynamics do not reveal noticeable differences between the phases, the long-time values of the correlation measures appear to indicate the critical region.
Original languageEnglish
JournalThe European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Volume71
Issue number206
Early online date03 Aug 2017
DOIs
Publication statusEarly online date - 03 Aug 2017

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