University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Wednesday, October 11th 2017
1:25 pm:
Speaker: Chien-Hung Lin, University of Minnesota
Subject: Protected surface states of 3D bosonic symmetry-protected topological phases

We show that the surface states of three-dimensional bosonic symmetry protected topological (SPT) phases with unitary symmetries are protected: their surface must be gapless as long as the symmetry is not broken and the surface is not topologically ordered. We demonstrate the result by constructing an exactly soluble lattice model which realizes a nontrivial Z2×Z2- SPT phase in three dimensions and showing that the model has protected surface states. 

Faculty Host: Fiona Burnell

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