On entanglement evolution across defects in critical chains
Author(s): V. Eisler, I. Peschel
Journal: Europhys. Lett.
DOI Number: 10.1209/0295-5075/99/20001
Link: Link to publication
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.Note: http://arxiv.org/abs/1205.4331 File: Link to PDF