Spreading of entanglement and correlations after a quench with intertwined quasiparticles
Abstract
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.
Keywords
Cite
@article{arxiv.1807.10176,
title = {Spreading of entanglement and correlations after a quench with intertwined quasiparticles},
author = {Alvise Bastianello and Pasquale Calabrese},
journal= {arXiv preprint arXiv:1807.10176},
year = {2018}
}
Comments
Submission to Scipost v2; minor typos corrected; 17 pages; 4 figures