(Seminar) Symmetry Enriched Topological phases in three dimensions--Institute of Theoretical Physics，Chinese Academy of Sciences

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09/19 2018

Abstract

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