Braided tensor equivalence conjecture for the quantum Hamiltonian reduction functor

Let g\mathfrak{g} be the affine Lie algebra under consideration, let KLk(g)\mathrm{KL}_k(\mathfrak{g}) be the category generated by the modules Lk(λ)L_k(\lambda) for λPrZk\lambda\in\mathrm{Pr}_{\mathbb{Z}}^k, and let KLk,f(g)\mathrm{KL}_{k,f}(\mathfrak{g}) be the category of WkD+\mathcal{W}_k^{D^+}-modules generated by Lk(λ)\mathbf{L}_k(\lambda). Consider the functor

Hf0 ⁣:KLk(g)KLk,f(g),Lk(λ)Lk(λ).H_f^0\colon \mathrm{KL}_k(\mathfrak{g})\longrightarrow\mathrm{KL}_{k,f}(\mathfrak{g}),\qquad L_k(\lambda)\mapsto\mathbf{L}_k(\lambda).

Braided tensor equivalence conjecture. The functor Hf0H_f^0 is an equivalence of braided tensor categories. The source already states that this functor is an equivalence of abelian categories and that both categories are braided tensor categories; compatibility with the braided tensor structures is the remaining conjectural assertion.

Sources & referencesView supporting material

Primary source

Justine Fasquel and Shigenori Nakatsuka, “Orthosymplectic Feigin-Semikhatov duality”, arXiv:2307.14574 (2025).

Additional references

2 papers in this index state this conjecture (2022–2023). The statement above is taken from the most recent of them; the others are arXiv:2210.04678.

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