paper

Entanglement negativity after a global quantum quench

arXiv:1410.0900 · doi:10.1088/1742-5468/2014/12/P12017

Abstract

We study the time evolution of the logarithmic negativity after a global quantum quench. In a 1+1 dimensional conformal invariant field theory, we consider the negativity between two intervals which can be either adjacent or disjoint. We show that the negativity follows the quasi-particle interpretation for the spreading of entanglement. We check and generalise our findings with a systematic analysis of the negativity after a quantum quench in the harmonic chain, highlighting two peculiar lattice effects: the late birth and the sudden death of entanglement.

32 pages, 10 figures, v2: minor corrections, published version

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Entanglement negativity after a global quantum quench · wovepaper