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arXiv 1609.06303cond-mat.str-elcond-mat.quant-gasquant-ph
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玻色子与费米子相互作用系统的Floquet拓扑序

Floquet Topological Order in Interacting Systems of Bosons and Fermions

Fenner Harper, Rahul Roy

摘要:

周期性驱动的非相互作用系统可能会表现出异常的手征边缘模式,尽管主机带平凡的拓扑结构。我们发现,这些驱动器有令人惊讶的多体类似物,对应于A类,表现出异常的电荷和信息传输的边界。这种形式的驱动适用于玻色子、费米子和自旋的一般系统,并且可以由作用在开放系统边缘的反常幺正算符来表征。我们发现这些算子对所有的局部扰动都是鲁棒的,并且可以用一对互质整数来分类。这定义了动力学拓扑序的概念,可以应用于一般的时间依赖系统,包括多体局域相或时间晶体。

英文摘要:

Periodically driven noninteracting systems may exhibit anomalous chiral edge modes, despite hosting bands with trivial topology. We find that these drives have surprising many-body analogs, corresponding to class A, which exhibit anomalous charge and information transport at the boundary. Drives of this form are applicable to generic systems of bosons, fermions, and spins, and may be characterized by the anomalous unitary operator that acts at the edge of an open system. We find that these operators are robust to all local perturbations and may be classified by a pair of coprime integers. This defines a notion of dynamical topological order that may be applied to general time-dependent systems, including many-body localized phases or time crystals.

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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