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Title: Quantum quench and scaling of entanglement entropy
Authors: Caputa, Paweł
Das, Sumit R.
Nozaki, Masahiro
Tomiya, Akio
Issue Date: 10-Sep-2017
Publisher: Elsevier BV
Journal title: Physics Letters B
Volume: 772
Start page: 53
End page: 57
Abstract: Global quantum quench with a finite quench rate which crosses critical points is known to lead to universal scaling of correlation functions as functions of the quench rate. In this work, we explore scaling properties of the entanglement entropy of a subsystem in a harmonic chain during a mass quench which asymptotes to finite constant values at early and late times and for which the dynamics is exactly solvable. When the initial state is the ground state, we find that for large enough subsystem sizes the entanglement entropy becomes independent of size. This is consistent with Kibble–Zurek scaling for slow quenches, and with recently discussed “fast quench scaling” for quenches fast compared to physical scales, but slow compared to UV cutoff scales.
Rights: © 2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3.
DOI(Published Version): 10.1016/j.physletb.2017.06.017
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