arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1602.04804cond-mat.str-elcond-mat.dis-nncond-mat.stat-mechquant-ph
收藏

周期驱动相互作用系统拓扑相的分类

Classification of topological phases in periodically driven interacting systems

Dominic V. Else, Chetan Nayak

摘要:

我们认为拓扑相位周期性驱动(Floquet)系统表现出多体局域化,保护对称性$G$。我们认为这样的阶段和拓扑相的对称性$\mathbb{Z} \rtimes G$,其中额外的$\mathbb{Z}$帐户的离散时间平移对称性保护的非驱动系统之间的一般对应关系。因此,例如,没有内在拓扑顺序的$d$空间维度中的玻色子相(SPT相)通过上同调群$H^{d+1}(\mathbb{Z} \rtimes G, \mathrm{U}(1))$分类。对于酉对称性,我们解释额外产生的Floquet相位的低维SPT阶段,在一个时间步期间被泵送到边界。这些结果也意味着存在的新的富拓扑(SET)订单保护的驱动器的周期性。

英文摘要:

We consider topological phases in periodically driven (Floquet) systems exhibiting many-body localization, protected by a symmetry $G$. We argue for a general correspondence between such phases and topological phases of undriven systems protected by symmetry $\mathbb{Z} \rtimes G$, where the additional $\mathbb{Z}$ accounts for the discrete time translation symmetry. Thus, for example, the bosonic phases in $d$ spatial dimensions without intrinsic topological order (SPT phases) are classified by the cohomology group $H^{d+1}(\mathbb{Z} \rtimes G, \mathrm{U}(1))$. For unitary symmetries, we interpret the additional resulting Floquet phases in terms of the lower-dimensional SPT phases that are pumped to the boundary during one time step. These results also imply the existence of novel symmetry-enriched topological (SET) orders protected solely by the periodicity of the drive.

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。

↑