On entanglement evolution across defects in critical chains
Statistical Mechanics
2015-06-05 v2
Abstract
We consider a local quench where two free-fermion half-chains are coupled via a defect. We show that the logarithmic increase of the entanglement entropy is governed by the same effective central charge which appears in the ground-state properties and which is known exactly. For unequal initial filling of the half-chains, we determine the linear increase of the entanglement entropy.
Cite
@article{arxiv.1205.4331,
title = {On entanglement evolution across defects in critical chains},
author = {Viktor Eisler and Ingo Peschel},
journal= {arXiv preprint arXiv:1205.4331},
year = {2015}
}
Comments
11 pages, 5 figures, minor changes, reference added