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BPS invariants from p-adic integrals

Published online by Cambridge University Press:  30 May 2024

Francesca Carocci
Affiliation:
Mathematics Department, University of Geneva, Office 6.05, Rue du Conseil-Général 7-9, CH-1204 Geneva, Switzerland francesca.carocci@unige.ch
Giulio Orecchia
Affiliation:
White Oak Asset Management, Rue du Rhône 17, CH-1204 Geneva, Switzerland giulioorecchia@gmail.com
Dimitri Wyss
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Chair of Arithmetic Geometry, CH-1015 Lausanne, Switzerland dimitri.wyss@epfl.ch

Abstract

We define $p$-adic $\mathrm {BPS}$ or $p\mathrm {BPS}$ invariants for moduli spaces $\operatorname {M}_{\beta,\chi }$ of one-dimensional sheaves on del Pezzo and K3 surfaces by means of integration over a non-archimedean local field $F$. Our definition relies on a canonical measure $\mu _{\rm can}$ on the $F$-analytic manifold associated to $\operatorname {M}_{\beta,\chi }$ and the $p\mathrm {BPS}$ invariants are integrals of natural ${\mathbb {G}}_m$ gerbes with respect to $\mu _{\rm can}$. A similar construction can be done for meromorphic and usual Higgs bundles on a curve. Our main theorem is a $\chi$-independence result for these $p\mathrm {BPS}$ invariants. For one-dimensional sheaves on del Pezzo surfaces and meromorphic Higgs bundles, we obtain as a corollary the agreement of $p\mathrm {BPS}$ with usual $\mathrm {BPS}$ invariants through a result of Maulik and Shen [Cohomological $\chi$-independence for moduli of one-dimensional sheaves and moduli of Higgs bundles, Geom. Topol. 27 (2023), 1539–1586].

Information

Type
Research Article
Copyright
© 2024 The Author(s). The publishing rights in this article are licensed to Foundation Compositio Mathematica under an exclusive licence

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