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arXiv 1812.09862cond-mat.mes-hall
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电路网络中电磁波的陈式绝缘体

Chern insulators for electromagnetic waves in electrical circuit networks

Rafael Haenel, Timothy Branch, Marcel Franz

摘要:

由电容器和电感器组成的周期网络已被证明具有关于入射电磁波的拓扑性质。在这里,我们开发了一个类比之间的数学描述的波传播在这样的网络和模型的马约拉纳费米子跳跃的晶格。使用这个类比,我们提出了简单的电气网络架构,实现陈绝缘相位的电磁波。这样的陈省身绝缘网络具有用于一系列信号频率的体间隙,其易于调谐,并且表现出拓扑保护的手性边缘模式,其穿过间隙并且对扰动是鲁棒的。必要的时间反演对称性破缺是通过包括一类弱耗散霍尔电阻元件,我们详细描述其物理实现。

英文摘要:

Periodic networks composed of capacitors and inductors have been demonstrated to possess topological properties with respect to incident electromagnetic waves. Here, we develop an analogy between the mathematical description of waves propagating in such networks and models of Majorana fermions hopping on a lattice. Using this analogy we propose simple electrical network architectures that realize Chern insulating phases for electromagnetic waves. Such Chern insulating networks have a bulk gap for a range of signal frequencies that is easily tunable and exhibit topologically protected chiral edge modes that traverse the gap and are robust to perturbations. The requisite time reversal symmetry breaking is achieved by including a class of weakly dissipative Hall resistor elements whose physical implementation we describe in detail.

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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