Tan Wei, Chen Liang, Ji Xia, Lin Hai-Qing
Beijing Computational Science Research Center, Beijing 100084, China.
Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China.
Sci Rep. 2014 Dec 9;4:7381. doi: 10.1038/srep07381.
Photonic simulations of quantum Hall edge states and topological insulators have inspired considerable interest in recent years. Interestingly, there are theoretical predictions for another type of topological states in topological superconductors, but debates over their experimental observations still remain. Here we investigate the photonic analogue of the p(x) + ip(y) model of topological superconductor. Two essential characteristics of topological superconductor, particle-hole symmetry and p(x) + ip(y) pairing potentials, are well emulated in photonic systems. Its topological features are presented by chiral edge state and zero-energy mode at a vortex. This work may fertilize the study of photonic topological states, and open up the possibility for emulating wave behaviors in superconductors.
近年来，量子霍尔边缘态和拓扑绝缘体的光子模拟引起了人们极大的兴趣。有趣的是，对于拓扑超导体中另一种类型的拓扑态有理论预测，但关于它们的实验观测仍存在争议。在此，我们研究拓扑超导体的p(x)+ip(y)模型的光子模拟物。拓扑超导体的两个基本特征，即粒子-空穴对称性和p(x)+ip(y)配对势，在光子系统中得到了很好的模拟。其拓扑特征由手性边缘态和涡旋处的零能模呈现。这项工作可能会促进光子拓扑态的研究，并为模拟超导体中的波行为开辟可能性。
