Higher twisted Drinfeld center equivalence conjecture

Let GG be a finite group, let τh\tau_h denote the transgression map, and let ωZn+2(G,k×)\omega\in Z^{n+2}(G,\mathbf{k}^{\times}). Suppose that a suitable notion of an nn-category has been defined, and write nVecGωn\mathrm{Vec}_G^\omega for the corresponding twisted monoidal nn-category. Higher center conjecture. There is an equivalence of nn-categories

Z(nVecGω)[h]ClnRep(CG(h),τh(ω)).\mathcal{Z}(n\mathrm{Vec}_G^\omega) \simeq \boxplus_{[h] \in \operatorname{Cl}} \,\, n\mathrm{Rep}(C_G(h), \tau_h(\omega)).

This proposes the higher-categorical analogue of the twisted Drinfeld double description for 1-categories. The statement remains conditional on defining the relevant notion of an nn-category and is presented as an expectation rather than an established result.

Sources & referencesView supporting material

Primary source

Liang Kong, Yin Tian and Shan Zhou, “The center of monoidal 2-categories in 3+1D Dijkgraaf-Witten Theory”, arXiv:1905.04644 (2020).

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