arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2110.04097math-phcond-mat.mes-hallmath.MP
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浅水波中的拓扑学:谱流透视

Topology in shallow-water waves: A spectral flow perspective

Clément Tauber, Guo Chuan Thiang

摘要:

在拓扑绝缘体的背景下,浅水模型最近被证明表现出异常的体积边缘对应。对于带边界的模型,参数空间同时包含纵向动量和边界条件,并表现出奇异性。我们通过定义一种新的边缘指数作为这个奇异点周围的谱流来解决这个问题。至关重要的是,这个边缘指数样本的整个家庭的边界条件,我们解释为一个边界驱动的量化泵浦。我们的边指数是稳定的,由于谱流的拓扑性质,我们证明了它的对应关系,使用散射理论和相对版本的Levinson定理的散装陈数指数。全谱流结构的模式进行了研究。

英文摘要:

In the context of topological insulators, the shallow-water model was recently shown to exhibit an anomalous bulk-edge correspondence. For the model with a boundary, the parameter space involves both longitudinal momentum and boundary conditions, and exhibits a peculiar singularity. We resolve the anomaly in question by defining a new kind of edge index as the spectral flow around this singularity. Crucially, this edge index samples a whole family of boundary conditions, and we interpret it as a boundary-driven quantized pumping. Our edge index is stable due to the topological nature of spectral flow, and we prove its correspondence with the bulk Chern number index using scattering theory and a relative version of Levinson's theorem. The full spectral flow structure of the model is also investigated.

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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