TY - JOUR

T1 - Quantum quench and scaling of entanglement entropy

AU - Caputa, Paweł

AU - Das, Sumit R.

AU - Nozaki, Masahiro

AU - Tomiya, Akio

N1 - Publisher Copyright:
© 2017 The Author(s)

PY - 2017/9/10

Y1 - 2017/9/10

N2 - 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.

AB - 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.

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U2 - 10.1016/j.physletb.2017.06.017

DO - 10.1016/j.physletb.2017.06.017

M3 - Article

AN - SCOPUS:85020879296

SN - 0370-2693

VL - 772

SP - 53

EP - 57

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -