Conjectures on ribbon categories of modules for W_Q(r) and B_Q(r)

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Let g\mathfrak{g} be the Lie algebra with Cartan matrix AA, rank rank⁡(g)\operatorname{rank}(\mathfrak{g}), root lattice QQ, weight lattice PP, dual Cartan h∗\mathfrak{h}^*, and Weyl vector ρ\rho. Let rr be a positive integer, let ar=−1/ra_r=\sqrt{-1/r}, and let Rep⁡⟨s⟩WQ(r)\operatorname{Rep}_{\langle s\rangle}\mathcal{W}_Q(r) and Rep⁡⟨s⟩BQ(r)\operatorname{Rep}_{\langle s\rangle}B_Q(r) denote the full subcategories of modules generated by irreducibles.

The conjectures. Rep⁡⟨s⟩WQ(r)\operatorname{Rep}_{\langle s\rangle}\mathcal{W}_Q(r) is a finite non-degenerate ribbon category with det⁡(A)⋅rrank⁡(g)\operatorname{det}(A)\cdot r^{\operatorname{rank}(\mathfrak{g})} distinct irreducible modules. Moreover, Rep⁡⟨s⟩BQ(r)\operatorname{Rep}_{\langle s\rangle}B_Q(r) is non-degenerate and ribbon if rr is odd or ρ∈Q\rho\in Q, and its irreducible modules can be indexed by

{Sγμ∣μ,γ∈h∗, and ⟨λ,μ+rarγ⟩∈Z for all λ∈P}\{ S^{\mu}_{\gamma}\mid \mu,\gamma\in\mathfrak{h}^*,\ \text{and }\langle\lambda,\mu+ra_r\gamma\rangle\in\mathbb{Z}\text{ for all }\lambda\in P\}

with relations Sγμ≅Sγ+arλμ+λS^{\mu}_{\gamma}\cong S^{\mu+\lambda}_{\gamma+a_r\lambda} for all λ∈rP\lambda\in rP.

These conjectures extend the rank-one connections between unrolled quantum groups and singlet, triplet, and BpB_p vertex operator algebras to higher rank. In particular, they predict finite non-degenerate ribbon structures and explicit parametrizations of irreducible modules for the corresponding vertex operator algebras.

References

Primary source

Thomas Creutzig and Matthew Rupert, “Uprolling Unrolled Quantum Groups”, arXiv:2005.12445 (2020).

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