The LL_{\infty} and dd-algebra structure conjecture for CFT deformations

Let A{\cal A} be the cooperad governing the OPE data, let HH be the state space regarded as an A{\cal A}-algebra, and let g\mathfrak g be the LL_{\infty}-algebra controlling formal deformations of HH as an A{\cal A}-algebra. Define

Ωd(H)=Hd(Rd).\Omega^d(H)=H\otimes\wedge^d(\mathbb R^d).

An LL_{\infty}-morphism is a morphism in the homotopy Lie-algebraic sense, and a dd-algebra is the structure referenced in [KoSo2]. LL_{\infty} and dd-algebra structure conjecture. There is an LL_{\infty}-algebra structure on Ωd(H)\Omega^d(H), there exists an LL_{\infty}-morphism Ωd(H)g\Omega^d(H)\to\mathfrak g, and there is a dd-algebra structure on Ω(H)\Omega^{\bullet}(H). The conjecture proposes algebraic structures on the differential-form-valued CFT state space and a map to its deformation-controlling algebra; the source gives no resolution.

Sources & referencesView supporting material

Primary source

Yan Soibelman, “Moduli space of Conformal Field Theories and non-commutative Riemannian geometry”, arXiv:2506.00896 (2025).

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