Integer quantum Hall state in two-component Bose gases in a synthetic magnetic field.
Integer quantum Hall state in two-component Bose gases in a synthetic magnetic field.
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DOI：
10.1103/physrevlett.111.090401
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发表时间：
2013-04
影响因子：
8.6
通讯作者：
S. Furukawa;Masahito Ueda
中科院分区：
文献类型：
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作者：
S. Furukawa;Masahito Ueda
本文研究了强磁场中的双组分（或赝自旋1/2）玻色气体。利用精确对角化方法，我们证明了当组元内和组元间相互作用强度相当时，在总填充因子ν=1+1时，出现了一个没有内禀拓扑序的整数量子Hall态的玻色模拟.这提供了在量子气体的受控设置中受保护的拓扑相的一个主要例子。这种状态的实空间纠缠谱被发现是由反向传播的手征模与来自有效的陈-西蒙斯理论的边缘理论一致。
We study two-component (or pseudospin-1/2) Bose gases in a strong synthetic magnetic field. Using exact diagonalization, we show that a bosonic analog of an integer quantum Hall state with no intrinsic topological order appears at the total filling factor ν=1+1 when the strengths of intracomponent and intercomponent interactions are comparable with each other. This provides a prime example of a symmetry-protected topological phase in a controlled setting of quantum gases. The real-space entanglement spectrum of this state is found to be comprised of counterpropagating chiral modes consistent with the edge theory derived from an effective Chern-Simons theory.