Non-Gaussianity of Entanglement Entropy and Correlations of Composite Operators

• URL: http://arxiv.org/abs/2105.02598v2
• Date: Thu, 27 May 2021 16:40:07 GMT
• Title: Non-Gaussianity of Entanglement Entropy and Correlations of Composite Operators
• Authors: Satoshi Iso, Takato Mori, Katsuta Sakai
• Abstract summary: This paper is an extended version of arXiv:2103.05303 to study entanglement entropy (EE) of a half space in interacting field theories. In the previous paper, we have proposed a novel method to calculate EE based on the notion of $mathbbZ_M$ gauge theory on Feynman diagrams.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This is an extended version of the previous paper arXiv:2103.05303 to study entanglement entropy (EE) of a half space in interacting field theories. In the previous paper, we have proposed a novel method to calculate EE based on the notion of $\mathbb{Z}_M$ gauge theory on Feynman diagrams, and shown that EE consists of two particular contributions, one from a renormalized two-point correlation function in the two-particle irreducible (2PI) formalism and another from interaction vertices. In this paper, we further investigate them in more general field theories and show that the non-Gaussian contributions from vertices can be interpreted as renormalized correlation functions of composite operators.

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