The irregular Riemann–Hilbert isomorphism conjecture for homogeneous elements

Let GG be a reductive group over C\mathbb{C}, let ψg((t))\psi\in\mathfrak{g}((t)) be homogeneous of slope ν>0\nu>0, let shs\in\mathfrak{h}, and set κ=exp(s)H\kappa=\exp(s)\in H. Let sMdR,ψ{}_{s}\mathcal{M}_{\operatorname{dR},\psi} be the de Rham moduli stack with residue ss, and let κMBet,ψ{}_{\kappa}\mathcal{M}_{\operatorname{Bet},\psi} be the corresponding Betti moduli stack. The enhanced irregular Riemann–Hilbert map is

RH~:sMdR,ψκMBet,ψ.\widetilde{\operatorname{RH}}:{}_{s}\mathcal{M}_{\operatorname{dR},\psi}\longrightarrow {}_{\kappa}\mathcal{M}_{\operatorname{Bet},\psi}.

Irregular Riemann–Hilbert isomorphism conjecture. For any reductive GG over C\mathbb{C} and homogeneous element ψ\psi in g((t))\mathfrak{g}((t)) of slope ν>0\nu>0, and any shs\in\mathfrak{h} with κ=exp(s)\kappa=\exp(s), the map RH~\widetilde{\operatorname{RH}} is an analytic isomorphism.

This would identify the de Rham and Betti moduli spaces analytically, extending the irregular non-abelian Hodge correspondence in this homogeneous setting. The source gives no resolution status.

Sources & referencesView supporting material

Primary source

Roman Bezrukavnikov, Pablo Boixeda Alvarez, Michael McBreen and Zhiwei Yun, “Non-abelian Hodge moduli spaces and homogeneous affine Springer fibers”, arXiv:2209.14695 (2022).

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