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(Seminar) Symmetry Enriched Topological phases in three dimensions
2018-09-19     Text Size:  A

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

 Chinese Academy of Sciences

Seminar

Title

题目

Symmetry Enriched Topological phases in three dimensions

Speaker

报告人

Zheng-Xin Liu

Affiliation

所在单位

Renmin University of China

Date

日期

2:30pm, Sep 19, 2018, Wednesday

Venue

地点

Conference Room 322, ITP main building

Abstract

摘要

Symmetry enriched topological (SET) phases are long-ranged entangled topological states showing nontrivial symmetry fractionalization. While two-dimensional symmetry-enriched topological phases (SETs) have been intensively studied, much less is known about three-dimensional (3D) SET phases. Using topological BF theory, we studied topological orders enriched by Abelian symmetries in 3D, where the topological orders are described by Abelian gauge theories. We propose an algorithmic approach of imposing global symmetry on gauge theories. The resulting symmetric gauge theories may be served as low-energy effective theories of three-dimensional symmetric topological quantum spin liquids. We propose how to physically diagnose the ground-state properties of SET phases in gedanken experiments of charge-loop braidings (patterns of symmetry fractionalization) and the mixed multiloop braidings among deconfined loop excitations and confined symmetry fluxes.

Contact person

所内联系人

Chushun Tian

 

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