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arXiv 2103.05303hep-thquant-ph
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费曼图上标量场和$\mathbb{Z}_M$规范理论中的纠缠熵

Entanglement entropy in scalar field theory and $\mathbb{Z}_M$ gauge theory on Feynman diagrams

Satoshi Iso, Takato Mori, Katsuta Sakai

摘要:

相互作用场论中的纠缠熵(EE)有两个重要问题:紫外发散的重整化和真空的非高斯性。在这封信中,我们调查他们的两粒子不可约形式主义的框架。特别地,我们考虑了相互作用标量场理论中半空间的EE。在费曼图上用$\mathbb{Z}_M$规范理论表示:将$\mathbb{Z}_M$通量分配到格元上,求和得到EE,某些通量位形被解释为传播子和顶点的扭曲。前者给出了一个高斯部分的EE书面的重整化2点函数,而后者反映了非高斯的真空。

英文摘要:

Entanglement entropy (EE) in interacting field theories has two important issues: renormalization of UV divergences and non-Gaussianity of the vacuum. In this letter, we investigate them in the framework of the two-particle irreducible formalism. In particular, we consider EE of a half space in an interacting scalar field theory. It is formulated as $\mathbb{Z}_M$ gauge theory on Feynman diagrams: $\mathbb{Z}_M$ fluxes are assigned on plaquettes and summed to obtain EE. Some configurations of fluxes are interpreted as twists of propagators and vertices. The former gives a Gaussian part of EE written in terms of a renormalized 2-point function while the latter reflects non-Gaussianity of the vacuum.

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