Radical chiral Floquet phases in a periodically driven Kitaev model and beyond
Radical chiral Floquet phases in a periodically driven Kitaev model and beyond
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DOI：
10.1103/physrevb.96.245116
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发表时间：
2017-01
影响因子：
3.7
通讯作者：
H. Po;L. Fidkowski;A. Vishwanath;A. Potter
中科院分区：
文献类型：
--
作者：
H. Po;L. Fidkowski;A. Vishwanath;A. Potter
手征拓扑相，量子霍尔态，其特征在于从一个非平凡的绝缘体产生的异常单向边缘输运。最近的发展表明，它们可以扩展到周期性驱动（Floquet）系统，其中量子信息代替电荷或能量被泵浦。作者发现了一个新的手性量子动力学的Floquet阶段，其边缘泵量子化单位的分数激发。这些相位是“激进的”，因为泵浦的量子维度是整数的平方根。出乎意料的是，这样的边缘边界与动态任意子嬗变的体积，展示了一种新形式的体积边界对应。
Chiral topological phases, like quantum Hall states, are characterized by anomalous unidirectional edge transport arising from a nontrivial insulating bulk. Recent developments suggest that they can be extended to periodically driven (Floquet) systems, where quantum information is pumped in lieu of charge or energy. The authors uncover a new chiral Floquet phase of quantum dynamics, whose edge pumps quantized units of fractionalized excitations. These phases are ``radical,'' in that the quantum dimension pumped is the square root of an integer. Unexpectedly, such edge borders a bulk with dynamical anyon transmutation, demonstrating a novel form of bulk-boundary correspondence.