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arXiv 2201.02722hep-thcond-mat.stat-mech
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QFT纠缠熵、二维费米子和规范场

QFT Entanglement Entropy, 2D Fermion and Gauge Fields

Bom Soo Kim

摘要:

通过穷尽$\mathbb{Z}_n$轨道共形场论中电磁顶点算符的所有成分,将二维环面上Dirac费米子在化学势、电流源和拓扑Wilson环存在下的纠缠和Rényi熵统一在一个框架中.我们采用不同的归一化不同的拓扑扇区来组织各种拓扑相变的背景下的纠缠熵。给出了$n=2$ Rényi熵的拓扑变换的图示。我们的分析计算揭示了许多新奇,并为现有的问题提供解决方案。我们已经决定提供非奇异的纠缠熵,它们在拓扑扇区中也是连续的。令人惊讶的是,在无限空间中,这些熵变得精确,并且只依赖于威尔逊环。在一个圆上,我们解决了熵微妙地依赖于零温下的化学势,这是有用的探测量子系统的基态能级。

英文摘要:

Entanglement and the Rényi entropies for Dirac fermions on 2 dimensional torus in the presence of chemical potential, current source, and topological Wilson loop are unified in a single framework by exhausting all the ingredients of the electromagnetic vertex operators of $\mathbb{Z}_n$ orbifold conformal field theory. We employ different normalizations for different topological sectors to organize various topological phase transitions in the context of entanglement entropy. Pictorial representations for the topological transitions are given for the $n=2$ Rényi entropy. Our analytic computations reveal numerous novelties and provide resolutions for existing issues. We have settled to provide non-singular entanglement entropies that are also continuous across the topological sectors. Surprisingly, in infinite space, these entropies become exact and depend only on the Wilson loop. On a circle, we resolve to find the entropies subtly depend on the chemical potential at zero temperature, which is useful for probing the ground state energy levels of quantum systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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