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Entanglement Entropy for Relevant and Geometric Perturbations

We continue the study of entanglement entropy for a QFT through a perturbative expansion of the path integral definition of the reduced density matrix. The universal entanglement entropy for a CFT perturbed by a relevant operator is calculated to second order in the coupling. We also explore the geometric dependence of entanglement entropy for a deformed planar entangling surface, finding surprises at second order.

preprint2015arXivOpen access
Vladimir RosenhausMichael Smolkin
cond-mat.stat-mechgr-qchep-thquant-ph
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Vladimir RosenhausMichael Smolkin

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