Gaitsgory–Lurie quantum fundamental local equivalence conjecture

Let GG be a reductive group, let Gˇ\check{G} be its Langlands dual group, let κ\kappa be a level, and let FLE\operatorname{FLE} be the canonical functor

FLE:Shvκ,ARan(GrG,ρ(ωX))LN,χΓ\lax(Ran,Repq(Gˇ)).\operatorname{FLE}:\operatorname{Shv}_{\kappa,A_{\operatorname{Ran}}}(\operatorname{Gr}_{G,\rho(\omega_X)})^{LN,\chi}\longrightarrow\Gamma^{\lax}(\operatorname{Ran},\operatorname{Rep}_q(\check{G})).

Gaitsgory–Lurie quantum fundamental local equivalence conjecture. The functor FLE\operatorname{FLE} is an equivalence.

This is presented as a stronger expected result needed for the construction of the quantum Langlands functor, extending the known construction of the corresponding functor by Gaitsgory and Hayash. Its status remains open.

Sources & referencesView supporting material

Primary source

Ekaterina Bogdanova, “Quantum Betti geometric Langlands functor”, arXiv:2606.29585 (2026).

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