论文标题
手性边缘状态位置摇晃有限大小的蜂窝光学晶格
Chiral edge states in position shaken finite-size honeycomb optical lattice
论文作者
论文摘要
边缘的量子异常对应于系统中的拓扑阶段，手性边缘状态可以反映散装带的拓扑特性。在本文中，我们演示了Floquet System的手性边缘状态的模拟。通过周期性的摇动，我们打破了系统的时间逆转对称性，并获得具有非零陈数的拓扑非平凡状态。在拓扑非平凡区域，我们发现晶格不同侧面的手性边缘状态，手性边缘状态的位置随拓扑阶段而变化。此外，发现无间隙边界激发出现在拓扑相变点上。它提供了一个新方案，以模拟浮雕系统中的手性边缘状态，并促进无间隙边界激发的研究。
The quantum anomalies at the edges correspond to the topological phases in the system, and the chiral edge states can reflect bulk bands' topological properties. In this paper, we demonstrate a simulation of Floquet system's chiral edge states in position shaken finite-size honeycomb optical lattice. Through the periodical shaking, we break the time reversal symmetry of the system, and get the topological non-trivial states with non-zero Chen number. At the topological non-trivial area, we find chiral edge states on different sides of the lattice, and the locations of chiral edge states change with the topological phase. Further, gapless boundary excitations are found to appear at the topological phase transition points. It provides a new scheme to simulate chiral edge states in the Floquet system, and promotes the study of gapless boundary excitations.
