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Spreading of entanglement and correlations after a quench with intertwined quasiparticles

by Alvise Bastianello, Pasquale Calabrese

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Submission summary

Authors (as registered SciPost users): Alvise Bastianello
Submission information
Preprint Link:  (pdf)
Date accepted: 2018-10-08
Date submitted: 2018-09-26 02:00
Submitted by: Bastianello, Alvise
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • Quantum Physics
  • Statistical and Soft Matter Physics
Approach: Theoretical


We extend the semiclassical picture for the spreading of entanglement and correlations to quantum quenches with several species of quasiparticles that have non-trivial pair correlations in momentum space. These pair correlations are, for example, relevant in inhomogeneous lattice models with a periodically-modulated Hamiltonian parameter. We provide explicit predictions for the spreading of the entanglement entropy in the space-time scaling limit. We also predict the time evolution of one- and two-point functions of the order parameter for quenches within the ordered phase. We test all our predictions against exact numerical results for quenches in the Ising chain with a modulated transverse field and we find perfect agreement.

Published as SciPost Phys. 5, 033 (2018)

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