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BPS invariants from p-adic integrals
Published online by Cambridge University Press: 30 May 2024
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].
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- © 2024 The Author(s). The publishing rights in this article are licensed to Foundation Compositio Mathematica under an exclusive licence
References
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