Physics - The Anthony J Leggett Institute for Condensed Matter Theory Seminar

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Special Institute for Condensed Matter Theory Seminar: Climbing the ladder of topological bosonic orbifold phases in the orthogonal family: from gauging dihedral symmetry to metaplectic anyons and more

Event Type
Ceremony/Service
Sponsor
The Institute for Condensed Matter Theory
Date
Dec 17, 2020   11:00 am  
Speaker
Yichen Hu (Oxford)
Views
65

We present a coupled-wire model of a family of bosonic orbifold topological phases in two spatial dimensions using strongly interacting electrons with a charge 4e superconducting pairing. A topological phase M can carry a global discrete symmetry G. We focus on the bosonic SO(2n)_1 family that exhibits a dihedral D_k symmetry. The symmetry may become local when the system undergoes a phase transition that allows gauge fluxes and charges to emerge. These new phases M / G, referred to as twist liquids, host boundary edge modes that can be effectively described by an orbifold conformal field theory. We explicitly demonstrate these in the bosonic orbifold series of U(1)_l/ Z_2 , SO(2n)_1 / Z_k , SU(n)_1 / Z_2 and SO(2n) D_k , and present their quasiparticle excitations

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