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arXiv 1801.01210cond-mat.str-el
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具有对称性的(2+1)维拓扑相的分类

A Classification of (2+1)D Topological Phases with Symmetries

Tian Lan

摘要:

本文旨在总结2+1维对称拓扑相的分类结果。主要结果是拓扑相被归类为三个酉编织融合范畴$\mathcal E\subset\mathcal C\subset\mathcal M$加上手性中心荷$c$。这里$\mathcal E$是一个对称的融合范畴,$\mathcal E=\mathrm{Rep}(G)$是玻色子系统的范畴,$\mathcal E=\mathrm{sRep}(G^f)$是费米子系统的范畴,由对称群的表象组成,描述了具有对称性的局域激发; $\mathcal C$是体中所有准粒子激发的范畴,包含$\mathcal E$作为它的米格中心; $\mathcal M$是$\mathcal C$的最小模扩张,它也包含规范对称性缺陷。我们还研究了对称拓扑相的堆叠和基于这种分类的两种类型的任意子凝聚。

英文摘要:

This thesis aims at concluding the classification results for topological phases with symmetry in 2+1 dimensions. The main result is that topological phases are classified by a triple of unitary braided fusion categories $\mathcal E\subset\mathcal C\subset\mathcal M$ plus the chiral central charge $c$. Here $\mathcal E$ is a symmetric fusion category, $\mathcal E=\mathrm{Rep}(G)$ for boson systems or $\mathcal E=\mathrm{sRep}(G^f)$ for fermion systems, consisting of the representations of the symmetry group and describing the local excitations with symmetry; $\mathcal C$ is the category of all the quasiparticle excitations in the bulk, containing $\mathcal E$ as its Müger center; $\mathcal M$ is a minimal modular extension of $\mathcal C$, that also includes the gauged symmetry defects. We also study the stacking of topological phases with symmetry and two types of anyon condensations based on such classification.

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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