Talk page
Title:
Higher representations and BPS line operators
Speaker:
Abstract:
The talk concerns generalised group-like symmetries in supersymmetric theories in three dimensions. I will explain how the category of BPS line defects supports a 2-representation of the symmetry category. I will also discuss a geometric formulation in terms of the moduli stack of vacua, which is an enhancement of the moduli space of vacua that captures topological sectors in the infrared. This could be seen as a small step towards the broader goal of understanding how categorical symmetries act on the extended operator spectrum of a general quantum field theory.
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