On entanglement evolution across defects in critical chains

Author(s): V. Eisler, I. Peschel

Journal: Europhys. Lett.

Volume: 99

Page(s): 20001

Year: 2012

DOI Number: 10.1209/0295-5075/99/20001

Link: Link to publication

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.

Note: http://arxiv.org/abs/1205.4331

File: Link to PDF

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