Nichols-algebra conjecture for screening operators

Let WW be a vertex operator algebra containing Heisenberg fields αi\alpha_i, and let Si=Res(eαi)S_i=\operatorname{Res}(e^{\alpha_i}). Assume that WW decomposes into integer eigenvalues under the zero-modes of the αi\alpha_i. Define

M=iσαiW,M=\bigoplus_i \sigma_{\alpha_i}W,

where σαi\sigma_{\alpha_i} is the spectral flow generated by αi\alpha_i. Assume that each σαiW\sigma_{\alpha_i}W has diagonal braiding and defines a finite-dimensional Nichols algebra. Let V=iKer(Si)V=\bigcap_i\operatorname{Ker}(S_i), let AA be the algebra object defined by WW in the category of VV-modules, and let B(M)\mathcal B(M) be the Nichols algebra of MM in A-ModlocA\operatorname{-Mod}_{\mathrm{loc}}. Nichols-algebra conjecture for screening operators. There is an equivalence of tensor categories

B(M)-Mod(A-Modloc)A-Mod\mathcal B(M)\operatorname{-Mod}(A\operatorname{-Mod}_{\mathrm{loc}})\simeq A\operatorname{-Mod}

compatible with the central structure of A-ModlocA\operatorname{-Mod}_{\mathrm{loc}} on both sides. The conjecture seeks a general categorical realization of the relation between screening operators and Nichols algebras; the source records supporting results for Nichols-algebra relations and classifications in the diagonal-braiding case, but does not state a resolution of the equivalence.

Sources & referencesView supporting material

Primary source

Thomas Creutzig and Wenjun Niu, “Kazhdan-Lusztig Correspondence for Vertex Operator Superalgebras from Abelian Gauge Theories”, arXiv:2403.02403 (2026).

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