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arXiv 1408.1808physics.opticscond-mat.mes-hall
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微波网络拓扑边不变量的测量

Measurement of a topological edge invariant in a microwave network

Wenchao Hu, Jason Cornelius Pillay, Kan Wu, Michael Pasek, Perry Ping Shum, Y. D. Chong

摘要:

我们报告的测量拓扑不变量的电磁拓扑绝缘体模拟形成的微波网络,由散射矩阵本征值的绕组数。该实验可以看作是拓扑泵的一个变体,非零绕组意味着拓扑边缘态的存在。在微波网络中,与大多数其他表现出拓扑绝缘体物理的系统不同,绕组可以直接观察到。讨论了损耗对实验结果和拓扑边缘状态的影响。

英文摘要:

We report on the measurement of topological invariants in an electromagnetic topological insulator analog formed by a microwave network, consisting of the winding numbers of scattering matrix eigenvalues. The experiment can be regarded as a variant of a topological pump, with non-zero winding implying the existence of topological edge states. In microwave networks, unlike most other systems exhibiting topological insulator physics, the winding can be directly observed. The effects of loss on the experimental results, and on the topological edge states, is discussed.

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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