Phase Structure of Driven Quantum Systems
Phase Structure of Driven Quantum Systems
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DOI：
10.1103/physrevlett.116.250401
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发表时间：
2016-06-21
影响因子：
8.6
通讯作者：
Sondhi, S. L.
中科院分区：
文献类型：
--
作者：
Khemani, Vedika;Lazarides, Achilleas;Sondhi, S. L.
清洁和相互作用的周期性驱动系统被认为表现出一个单一的，平凡的“infinitetemperature”Floquet-ergodic阶段。相比之下，在这里，我们表明，他们的无序Floquet多体本地化的对应物可以表现出明显的有序相划定的急剧转变。其中一些是平衡态的类似物与打破对称性和拓扑秩序，而其他真正新的Floquet问题的特点是秩序和非平凡的周期性动力学。我们说明这些想法在驱动自旋链与伊辛对称性。
Clean and interacting periodically driven systems are believed to exhibit a single, trivial "infinitetemperature" Floquet-ergodic phase. In contrast, here we show that their disordered Floquet many-body localized counterparts can exhibit distinct ordered phases delineated by sharp transitions. Some of these are analogs of equilibrium states with broken symmetries and topological order, while others-genuinely new to the Floquet problem-are characterized by order and nontrivial periodic dynamics. We illustrate these ideas in driven spin chains with Ising symmetry.