Quench Dynamics in a Model with Tuneable Integrability Breaking
Abstract
We consider quantum quenches in an integrable quantum chain with tuneable-integrability-breaking interactions. In the case where these interactions are weak, we demonstrate that at intermediate times after the quench local observables relax to a prethermalized regime, which can be described by a density matrix that can be viewed as a deformation of a generalized Gibbs ensemble. We present explicit expressions for the approximately conserved charges characterizing this ensemble. We do not find evidence for a crossover from the prethermalized to a thermalized regime on the time scales accessible to us. Increasing the integrability-breaking interactions leads to a behaviour that is compatible with eventual thermalization.
Cite
@article{arxiv.1311.4557,
title = {Quench Dynamics in a Model with Tuneable Integrability Breaking},
author = {F. H. L. Essler and S. Kehrein and S. R. Manmana and N. J. Robinson},
journal= {arXiv preprint arXiv:1311.4557},
year = {2014}
}
Comments
22 pages, 35 figures, minor updates to manuscript