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arXiv 1408.2191physics.opticscond-mat.mes-hallcond-mat.quant-gasquant-ph
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探测非厄米光学系统中的拓扑不变量

Probing topological invariants in the bulk of a non-Hermitian optical system

Julia M. Zeuner, Mikael C. Rechtsman, Yonatan Plotnik, Yaakov Lumer, Mark S. Rudner, Mordechai Segev, Alexander Szameit

摘要:

拓扑绝缘体在本体上是绝缘的,但在其表面上具有导电状态。用于探测其拓扑性质的标准方法主要涉及探测表面,即使拓扑不变量是通过本体能带结构定义的。在这里,我们利用非厄米实验证明在光学系统中的拓扑转变,只使用散装的行为,而不求助于表面特性。这个概念与光学以外的广泛系统有关,其中表面物理学很难探测。

英文摘要:

Topological insulators are insulating in the bulk but feature conducting states on their surfaces. Standard methods for probing their topological properties largely involve probing the surface, even though topological invariants are defined via the bulk band structure. Here, we utilize non-hermiticy to experimentally demonstrate a topological transition in an optical system, using bulk behavior only, without recourse to surface properties. This concept is relevant for a wide range of systems beyond optics, where the surface physics is difficult to probe.

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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