Floquet topological states in shaking optical lattices
Floquet topological states in shaking optical lattices
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DOI：
10.1103/physreva.89.061603
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发表时间：
2014-02
影响因子：
2.9
通讯作者：
Wei-mou Zheng;H. Zhai
中科院分区：
文献类型：
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作者：
Wei-mou Zheng;H. Zhai
在这一快速通信中，我们以一维晶格和二维蜂窝晶格为例，提出了通过抖动光学晶格实现拓扑非平凡Floquit态的可行方案。二维模型中的拓扑相表现出量子反常霍尔效应。拓扑平凡态和非平凡态之间的转换可以很容易地由振动频率和振动幅度来控制。我们的计划有两个主要优点。首先，静态哈密顿量和振荡法都足够简单，易于实现。其次，它需要相对较小的抖动幅度，因此可以最大限度地减少发热。这两个优点使我们的方案更加实用。
In this Rapid Communication we propose realistic schemes to realize topologically nontrivial Floquet states by shaking optical lattices, using both the one-dimensional lattice and two-dimensional honeycomb lattice as examples. The topological phase in the two-dimensional model exhibits quantum anomalous Hall effect. The transition between topological trivial and nontrivial states can be easily controlled by both shaking frequency and shaking amplitude. Our schemes have two major advantages. First, both the static Hamiltonian and the shaking scheme are sufficiently simple to implement. Secondly, it requires relatively small shaking amplitude and therefore heating can be minimized. These two advantages make our schemes much more practical.