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arXiv · 1205.4331

On entanglement evolution across defects in critical chains

Viktor Eisler·Ingo Peschel
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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.

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Viktor Eisler, Ingo Peschel. 2012-06-04. On entanglement evolution across defects in critical chains. https://doi.org/10.1209/0295-5075%2F99%2F20001

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