Spreading of entanglement and correlations after a quench with intertwined quasiparticles
arXiv:1807.10176 · doi:10.21468/SciPostPhys.5.4.033
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.
Submission to Scipost v2; minor typos corrected; 17 pages; 4 figures
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