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arXiv 1302.4803cond-mat.str-el
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二维阿贝尔对称保护拓扑相的拓扑响应理论

Topological Response Theory of Abelian Symmetry-Protected Topological Phases in Two Dimensions

Meng Cheng, Zheng-Cheng Gu

摘要:

证明了具有有限阿贝尔对称性的保序拓扑相可以用Chern-Simons场论描述。我们提出了一个拓扑响应理论,唯一地确定SPT订单,这使我们能够获得一个系统的计划,任何有限的阿贝尔对称群玻色子SPT阶段进行分类。我们指出,即使是有限的阿贝尔对称,存在玻色子SPT相超出目前的陈-西蒙斯理论框架。我们还将该理论应用于具有$\mathbb{Z}_m$对称性的费米子SPT相,发现SPT相的分类依赖于$m$的奇偶性:对于偶数$m$,有$2m$类,其中$m$是本质上费米子SPT相,并且不能在任何玻色子系统中实现。最后,我们提出了一个分类计划的费米子SPT阶段的任何有限,阿贝尔对称。

英文摘要:

It has been shown that the symmetry-protected topological (SPT) phases with finite Abelian symmetries can be described by Chern-Simons field theory. We propose a topological response theory to uniquely identify the SPT orders, which allows us to obtain a systematic scheme to classify bosonic SPT phases with any finite Abelian symmetry group. We point out that even for finite Abelian symmetry, there exist bosonic SPT phases beyond the current Chern-Simons theory framework. We also apply the theory to fermionic SPT phases with $\mathbb{Z}_m$ symmetry and find the classification of SPT phases depends on the parity of $m$: for even $m$ there are $2m$ classes, $m$ out of which is intrinsically fermionic SPT phases and can not be realized in any bosonic system. Finally we propose a classification scheme of fermionic SPT phases for any finite, Abelian symmetry.

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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