论文标题
拓扑性手性界面状态超出绝缘体
Topological chiral interface states beyond insulators
论文作者
论文摘要
我们展示了如何在无间隙系统中设计界面状态的手性光谱。尽管散装带触摸 - 因此使乐队的拓扑指数不明显了，但这种频谱流具有拓扑来源，即使它与散装乐队共存，也使其可靠。通过绝热调制光子量子步行说明了这种现象。
We show how to engineer a chiral spectral flow of interface states in a gapless system. Although the bulk bands touch -- thus making the topological indices of the bands ill-defined -- this spectral flow has a topological origin that makes it robust even when it coexists with the bulk bands. This phenomenon is illustrated with an adiabatically modulated photonic quantum walk.
