Time evolution of entanglement entropy from a pulse

Details Time evolution of entanglement entropy from a pulse Time evolution of entanglement entropy from a pulse

2012-04-09

arxiv.org/abs/1204.1982v1

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 6 figures

Scientific paper

We calculate the time evolution of the entanglement entropy in a 1+1 CFT with a holographic dual when there is a localized left-moving packet of energy density. We find the gravity result agrees with a field theory result derived from the transformation properties of R\'enyi entropy. We are able to reproduce behavior which qualitatively agrees with CFT results of entanglement entropy of a system subjected to a local quench. In doing so we construct a finite diffeomorphism which tales three-dimensional anti-de Sitter space in the Poincar\'e patch to a general solution, generalizing the diffeomorphism that takes the Poincar\'e patch a BTZ black hole. We briefly discuss the calculation of correlation functions in these backgrounds and give results at large operator dimension.

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