Sandwich Construction of Symmetry TFTs for the Centre Symmetries of Chern-Simons, Yang-Mills, and Einstein Gravity
arXiv:2509.08819 · doi:10.1103/4dxd-kh1r
Abstract
We construct symmetry topological field theories (SymTFTs) using the sandwich construction of Pulmann-Å evera-Valach that manifest the centre symmetries of Chern-Simons theory and Yang-Mills theory as well as general relativity in the MacDowell-Mansouri formulation. The 'filling' of the sandwich is an AKSZ sigma model whose target space is a Weil algebra, augmented with discrete degrees of freedom given by a choice of topological boundary condition.
17 pages, 3 figures, 4 tables