Floquet engineering of exotic topological phases in systems of cold atoms
Floquet engineering of exotic topological phases in systems of cold atoms
复制标题
冷原子系统中奇异拓扑相的Floquet工程
DOI：
10.1103/physreva.100.023622
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发表时间：
2019-03
影响因子：
2.9
通讯作者：
Jun-Hong An
中科院分区：
文献类型：
--
作者：
Hui Liu;Tian-Shi Xiong;Wei Zhang;Jun-Hong An
具有大拓扑数的拓扑相作为一类具有潜在重要应用价值的物质奇异态被广泛研究。虽然一些模型已经被证明支持具有大拓扑数的状态，但由于各种干预因素的复杂性，它们很难在实体系统中实现。受冷原子系统合成自旋轨道耦合实现的启发[j]。Wu{\it等人}，Science \textbf{354}, 83(2016)]，我们提出了一种周期性猝灭方案来实现光学晶格中的大拓扑数相。通过在拉曼晶格中引入周期性猝灭，发现从静态拓扑平凡系统中可以可控地诱导出大量的拓扑边缘态。我们的结果为人工合成和操纵具有大拓扑数的奇异拓扑态提供了一种实验可行的方法。
Topological phases with large topological numbers have been widely studied as an typical class of exotic states of matter with potentially important applications. Although several models have been shown to support states with large topological numbers, they are difficult to realize in solid systems due to the complexity of various intervening factors. Inspired by the realization of synthetic spin-orbit coupling in cold-atom system [Z. Wu, {\it et al.}, Science \textbf{354}, 83 (2016)], we propose a periodic quenching scheme to realize large-topological-number phases in optical lattices. Via introducing the periodic quenching to the Raman lattice, it is found that a large number of topological edge states can be induced in a controllable manner from the static topologically trivial system. Our result provides an experimentally accessible method to artificially synthesize and manipulate exotic topological states with large topological numbers.
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DOI：
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发表时间：
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