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Journal of High Energy Physics

, 2014:119

First Online: 22 September 2014Received: 24 July 2014Accepted: 01 September 2014 Abstract

We consider the universal part of entanglement entropy across a plane in flat space for a QFT, giving a non-perturbative expression in terms of a spectral function. We study the change in entanglement entropy under a deformation by a relevant operator, providing a pertrubative expansion where the terms are correlation functions in the undeformed theory. The entanglement entropy for free massive fermions and scalars easily follows. Finally, we study entanglement entropy across a plane in a background geometry that is a deformation of flat space, finding new universal terms arising from mixing of geometry and couplings of the QFT.

KeywordsNonperturbative Effects Statistical Methods ArXiv ePrint: 1407.2891

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Author: Vladimir Rosenhaus - Michael Smolkin

Source: https://link.springer.com/







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