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arXiv 1802.00818cond-mat.str-el
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三维Floquet拓扑相的相互作用

Interacting Floquet topological phases in three dimensions

Dominic Reiss, Fenner Harper, Rahul Roy

摘要:

在两个维度上,相互作用的Floquet拓扑相位甚至可以在没有任何保护对称性的情况下出现,表现出对局部扰动鲁棒的手性边缘传输。我们探讨了一个类似的类Floquet拓扑相位在三维空间中,平移不变性,但没有其他对称性,这也表现出异常运输的边界表面。通过研究空间的局部二维酉算子,我们表明,这些阶段的边界行为属于等价类,每个特征在于由一组无穷的倒易晶格向量。反过来,这提供了一个分类的3D散装,我们认为这是完整的。我们证明,这样的阶段可能会产生完全可解的“交换驱动器”的批量。在这个过程中,我们表明,一般的交换驱动器在二维或三维的边缘行为可以推导出其行动的几何性质在散装,散装边界对应的形式。

英文摘要:

In two dimensions, interacting Floquet topological phases may arise even in the absence of any protecting symmetry, exhibiting chiral edge transport that is robust to local perturbations. We explore a similar class of Floquet topological phases in three dimensions, with translational invariance but no other symmetry, which also exhibit anomalous transport at a boundary surface. By studying the space of local 2D unitary operators, we show that the boundary behavior of such phases falls into equivalence classes, each characterized by an infinite set of reciprocal lattice vectors. In turn, this provides a classification of the 3D bulk, which we argue is complete. We demonstrate that such phases may be generated by exactly-solvable `exchange drives' in the bulk. In the process, we show that the edge behavior of a general exchange drive in two or three dimensions can be deduced from the geometric properties of its action in the bulk, a form of bulk-boundary correspondence.

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