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arXiv 1701.02111cond-mat.quant-gasphysics.atom-phquant-ph
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光晶格中超超冷原子的二维自旋轨道耦合

2D spin-orbit coupling for ultracold atoms in optical lattices

Fabian Grusdt, Tracy Li, Immanuel Bloch, Eugene Demler

摘要:

自旋轨道耦合(SOC)是许多奇异能带结构的核心,可以产生具有拓扑有序的多体态。本文提出了一种基于微波驱动和晶格振动相结合的方法,用于实现具有反转对称性的超冷原子的二维时反不变SOC。我们发现,Rashba和Dresselhaus SOC的强度可以独立地调整在一个自旋相关的正方形晶格。更一般地说,我们的方法可以用来打开不同的自旋状态之间的差距,而不打破时间反演对称性。我们证明,这允许实现的拓扑绝缘体中存在的SOC,这是密切相关的凯恩-梅勒模型。

英文摘要:

Spin-orbit coupling (SOC) is at the heart of many exotic band-structures and can give rise to many-body states with topological order. Here we present a general scheme based on a combination of microwave driving and lattice shaking for the realization of time-reversal invariant 2D SOC with ultracold atoms in systems with inversion symmetry. We show that the strengths of Rashba and Dresselhaus SOC can be independently tuned in a spin-dependent square lattice. More generally, our method can be used to open gaps between different spin states without breaking time-reversal symmetry. We demonstrate that this allows for the realization of topological insulators in the presence of SOC, which is closely related to the Kane-Mele model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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