Potent categorical Langlands duality for reductive groups

Let GG be a reductive group and let Gˇ\check G be its Langlands dual group. Denote by HGdR\mathcal{H}_G^{dR} and HGˇdR\mathcal{H}_{\check G}^{dR} the de Rham potent Hecke monads, and by G-cat⁡pot,dRG\operatorname{-cat}^{pot,dR} and Gˇ-cat⁡pot,dR\check G\operatorname{-cat}^{pot,dR} the corresponding de Rham potent categorical representation categories. Potent categorical Langlands duality. The multiplicative 2-Fourier transform identifies HGdR\mathcal{H}_G^{dR} with HGˇdR\mathcal{H}_{\check G}^{dR}, and consequently there is an equivalence

G-cat⁡pot,dR≃Gˇ-cat⁡pot,dR.G\operatorname{-cat}^{pot,dR}\simeq \check G\operatorname{-cat}^{pot,dR}.

This is the main conjectural extension of multiplicative 2-Fourier duality from tori to general reductive groups. The source further predicts a single Hecke monad over t/Λ×tˇ/Λˇ\mathfrak{t}/\Lambda\times\check{\mathfrak{t}}/\check\Lambda from which various Hecke categories arise, as well as analogous Betti and graded statements.

References

Primary source

David Ben-Zvi and David Nadler, “Potent categorical representations”, arXiv:2510.07482 (2025).

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