The center of monoidal 2-categories in 3+1D Dijkgraaf-Witten Theory

Liang Kong, Yin Tian, Shan Zhou

In this work, for a finite group $G$ and a 4-cocycle $\omega \in Z^4(G,{\mathbf{k}}^{\times })$, we compute explicitly the center of the monoidal 2-category ${2Vec}_G^{\omega }$ of $\omega$-…