Locally analytic representations in mixed characteristic via stacks

Abstract

For any $p$-adic Lie group $G$, we construct a group stack $G^\mathrm{la}$ over the $p$-adic branch of Clausen--Scholze's stack of norms such that quasicoherent sheaves on its classifying stack $*/G^\mathrm{la}$ recover locally analytic representations of $G$ after base change to any suitable Tate Huber pair, even in positive or mixed characteristic. We also show that smooth $\mathbb{F}_p$-representations of $G$ embed fully faithfully into sheaves on the mod $p$ fibre of $*/G^\mathrm{la}$ and establish Poincaré duality for cohomology of locally analytic representations in mixed characteristic.