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arXiv 2403.03038cond-mat.mes-hallcond-mat.stat-mechnlin.CD
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非线性Su-Schrieffer-Heeger模型中从拓扑到混沌的转变

Transition from topological to chaos in the nonlinear Su-Schrieffer-Heeger model

Kazuki Sone, Motohiko Ezawa, Zongping Gong, Taro Sawada, Nobuyuki Yoshioka, Takahiro Sagawa

AI总结:

本文研究非线性Su-Schrieffer-Heeger模型中拓扑边缘模随非线性增强向空间混沌的转变,揭示体-边对应关系失效的普遍机制,并提出弱非线性下拓扑不变量与稳定流形维数的对应关系。

摘要:

近期关于拓扑材料的研究正扩展到非线性领域,但其核心原理,即体-边对应关系,在强非线性区域中尚未被阐明。在此,我们揭示了非线性拓扑边缘模式可以通过增加非线性而表现出向空间混沌的转变,这可能是体-边对应关系失效的一种普遍机制。具体而言,我们揭示了描述零模空间分布的底层动力系统,并展示了混沌的出现。我们还提出了在足够弱的非线性条件下,拓扑不变量的绝对值与稳定流形维数之间的对应关系。我们的结果为研究非线性体-边对应关系提供了一个一般性的指导原则,该原则有可能被扩展到任意维度。

英文摘要:

Recent studies on topological materials are expanding into the nonlinear regime, while the central principle, namely the bulk-edge correspondence, is yet to be elucidated in the strongly nonlinear regime. Here, we reveal that nonlinear topological edge modes can exhibit the transition to spatial chaos by increasing nonlinearity, which can be a universal mechanism of the breakdown of the bulk-edge correspondence. Specifically, we unveil the underlying dynamical system describing the spatial distribution of zero modes and show the emergence of chaos. We also propose the correspondence between the absolute value of the topological invariant and the dimension of the stable manifold under sufficiently weak nonlinearity. Our results provide a general guiding principle to investigate the nonlinear bulk-edge correspondence that can potentially be extended to arbitrary dimensions.

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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