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arXiv 1410.5035cond-mat.quant-gas
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二维周期驱动费米系统中的Floquet拓扑超流和Majorana零模

Floquet Topological Superfluid and Majorana Zero Modes in Two-Dimensional Periodically Driven Fermi Systems

Xiaosen Yang

摘要:

我们提出了一种简单的方法来实现二维Floquet拓扑超流体的周期性调整的平方光晶格势的深度。我们证明了周期驱动可以诱导平凡超流体和Floquet拓扑超流体之间的拓扑相变。对于这个系统,我们验证了异常的体积边界对应,即强大的手征Floquet边缘状态可以出现,即使当所有的散装Floquet带的缠绕数为零。我们建立了两个Floquet Majorana零模分离的准能量空间中的存在性,与$\varepsilon_{0,π}=0,π/T$的拓扑缺陷。

英文摘要:

We propose a simple approach to realize two-dimensional Floquet topological superfluid by periodically tuning the depth of square optical lattice potentials. We show that the periodic driving can induce topological phase transitions between trivial superfluid and Floquet topological superfluid. For this systems we verify the anomalous bulk-boundary correspondence, namely that the robust chiral Floquet edge states can appear even when the winding number of all the bulk Floquet bands is zero. We establish the existence of two Floquet Majorana zero modes separated in the quasienergy space, with $\varepsilon_{0,π}=0,π/T$ at the topological defects.

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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