Diffeomorphisms as quadratic charges in 4d BF theory and related TQFTs
Diffeomorphisms as quadratic charges in 4d BF theory and related TQFTs
A bstract We present a Sugawara-type construction for boundary charges in 4d BF theory and in a general family of related TQFTs. Starting from the underlying current Lie algebra of boundary symmetries, this gives rise to well-defined quadratic charges forming an algebra of vector fields. In the case of 3d …