Quantum quench and scaling of entanglement entropy

Paweł Caputa, Sumit R. Das, Masahiro Nozaki, Akio Tomiya

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

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.

Original languageEnglish
Pages (from-to)53-57
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume772
DOIs
StatePublished - Sep 10 2017

Bibliographical note

Publisher Copyright:
© 2017 The Author(s)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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