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arXiv 2109.08274hep-thcond-mat.str-el
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关于Atiyah-Patodi-Singer指数定理、畴壁和Berry相的评论

Comments on the Atiyah-Patodi-Singer index theorem, domain wall, and Berry phase

Tetsuya Onogi, Takuya Yoda

摘要:

Atiyah-Patodi-Singer指数可以表示为具有畴壁质量的Dirac算子的eta不变量,畴壁质量在具有边界的拓扑绝缘体的反常流入中起着关键作用.本文提出了一个猜想:当绝热近似成立时,Atiyah-Patodi-Singer指数的新形式可以由畴壁Dirac算子的Berry相简单地给出.我们明确证实了这一猜想的特殊情况下,在二维解析计算是可能的。Berry相被分为体积和边界贡献,每个贡献给出了陈特征和η-不变量的体积积分。

英文摘要:

It is known that the Atiyah-Patodi-Singer index can be reformulated as the eta invariant of the Dirac operators with a domain wall mass which plays a key role in the anomaly inflow of the topological insulator with boundary. In this paper, we give a conjecture that the reformulated version of the Atiyah-Patodi-Singer index can be given simply from the Berry phase associated with domain wall Dirac operators when adiabatic approximation is valid. We explicitly confirm this conjecture for a special case in two dimensions where analytic calculation is possible. The Berry phase is divided into the bulk and the boundary contributions, each of which gives the bulk integration of the Chern character and the eta-invariant.

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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