Synthetic Gauge Fields in Synthetic Dimensions
Synthetic Gauge Fields in Synthetic Dimensions
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DOI：
10.1103/physrevlett.112.043001
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发表时间：
2014-01-28
影响因子：
8.6
通讯作者：
Lewenstein, M.
中科院分区：
文献类型：
--
作者：
Celi, A.;Massignan, P.;Lewenstein, M.
我们描述了一个简单的技术，用于产生冷原子晶格由均匀磁场穿透。我们的方法是将一维光学晶格扩展到由内部原子自由度提供的“维度”，产生合成的二维晶格。这些内部状态之间的适当激光耦合导致二维晶格内的均匀磁通量。我们表明，这种设置再现的磁晶格系统的主要特征，如分形霍夫施塔特蝴蝶谱和相关的陈绝缘相的手征边缘状态。
We describe a simple technique for generating a cold-atom lattice pierced by a uniform magnetic field. Our method is to extend a one-dimensional optical lattice into the "dimension" provided by the internal atomic degrees of freedom, yielding a synthetic two-dimensional lattice. Suitable laser coupling between these internal states leads to a uniform magnetic flux within the two-dimensional lattice. We show that this setup reproduces the main features of magnetic lattice systems, such as the fractal Hofstadter-butterfly spectrum and the chiral edge states of the associated Chern insulating phases.