【直播】【复旦理论物理报告会】耶鲁大学程蒙教授：一维对称性诱发的量子临界现象
直播二维码
本次报告由复旦大学物理系主办，于2021年11月12日9:30开始，授权蔻享学术进行网络直播。
一维对称性诱发的量子临界现象
报告人
程蒙（耶鲁大学）
时间
2021年11月12日 9:30
报告摘要
Quantum many-body systems at zero temperature can exhibit a rich variety of topological phenomena, which have been relatively well understood in gapped systems. In this talk I will discuss symmetry-enriched topological phenomena at quantum critical points in one-dimensional systems with emergent conformal invariance. Using an algebraic framework of (1+1)d conformal field theories (CFT), I will describe how the bulk-boundary correspondence between (1+1)d CFTs and doubled topological phases in (2+1)d can be utilized to compute the quantum anomalies of global symmetry. Next I will discuss topological edge modes of symmetry-enriched CFTs. Their stability against coupling to the gapless bulk can be viewed as generalizations of the celebrated Kondo problem. I will present sufficient conditions for screening of topological edge modes by the CFT, and discuss an interesting example in spin-1 chains.
报告人介绍
图 | 程蒙
Meng Cheng is an Assistant Professor of Physics at Yale University. He received his undergraduate degree from Nanjing University. In 2013, and obtained Ph.D. degree from the University of Maryland, College Park, where he studied topological superconductivity and its applications in quantum information processing. He then moved to a postdoctoral researcher position in Microsoft Research, Station Q in Santa Barbara, during which he investigated the interplay of global symmetry and topological quantum order. He joined the Department of Physics at Yale University in 2016.
复旦大学物理系理论物理报告会
复旦理论物理报告会，每周五上午9:30举行，报告时间为一到两个小时。报告会旨在加强国内外理论物理前沿研究进展的互动，着重凝聚态物理、量子信息和原子分子光学等学科中重要的理论物理方面的最新进展和发展方向。通过加强交流，促进不同物理学科的交叉互通， 启发新的研究角度和新科学思想。提高研究生对前沿理论物理研究动向的敏感度和思考新物理问题尤其是交叉学科问题的积极性。
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