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Title: Topological Insulators of Bosons
Originating Office: IAS
Speaker: Todadri, Senthil
Issue Date: 14-Dec-2012
Event Date: 14-Dec-2012
Group/Series/Folder: Record Group 8.15 - Institute for Advanced Study
Series 3 - Audio-visual Materials
Location: 8.15:3 box 1.8
Notes: IAS Asia Pacific Workshop on Condensed Matter Physics. Talk no. 7
Title from event program.
Host: Institute for Advanced Study.
Sponsor: The Collaborative Research Fund (CRF), The Research Grants Council (RGC).
Abstract: The speaker describes physical properties and realizations of examples of Symmetry Protected Topological insulating phases of bosons. These phases generalize the concept of topological insulators to interacting bosons or fermions. First, discuss the possibility of an Integer Quantum Hall Effect for a system of interacting bosons as a very useful example of this kind of phase, then describe the properties of three dimensional time reversal symmetric topological insulators of bosons. Different characterizations of these 3d bosonic topological insulators will be discussed, for instance, their quantized magnetoelectric effect and protected surface states. The speaker points out interesting connections of the theory of these surface states with deconfined quantum criticality and other phenomena familiar from 2d quantum magnetism. The surface may also be in a gapped symmetry preserving phase but must then have surface topological order. Symmetries are realized in this surface topological ordered phase in a manner not possible in a strictly two dimensional system with a local realization of symmetry.
Duration: 38 min.
Appears in Series:8.15:3 - Audio-visual Materials
Videos for Public -- Distinguished Lectures