Entanglement Tsunami in (1+1)-Dimensions
Stefan Leichenauer, Mudassir Moosa
TL;DR
This paper investigates the dynamics of entanglement entropy after a global quench in (1+1)-dimensional CFTs with holographic duals, highlighting differences from free theories and supporting the entanglement tsunami model.
Contribution
It demonstrates that the entanglement tsunami model accurately reproduces holographic entanglement entropy growth in large-$c$ CFTs with sparse spectra, contrasting with free field theory predictions.
Findings
Holographic calculations match entanglement entropy evolution after a quench.
Free quasiparticle models are insufficient for holographic CFTs.
Entanglement tsunami provides a successful phenomenological description.
Abstract
We study the time dependence of the entanglement entropy of disjoint intervals following a global quantum quench in (1+1)-dimensional CFTs at large- with a sparse spectrum. The result agrees with a holographic calculation but differs from the free field theory answer. In particular, a simple model of free quasiparticle propagation is not adequate for CFTs with a holographic dual. We elaborate on the entanglement tsunami proposal of Liu and Suh and show how it can be used to reproduce the holographic answer.
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