Swampland geometry and the gauge couplings

Abstract

The purpose of this paper is two-fold. First we review in detail the geometric aspects of the swampland program for supersymmetric 4d effective theories using a new and unifying language we dub `domestic geometry', the generalization of special Kähler geometry which does not require the underlying manifold to be Kähler or have a complex structure. All 4d SUGRAs are described by domestic geometry. As special Kähler geometries, domestic geometries carry formal brane amplitudes: when the domestic geometry describes the supersymmetric low-energy limit of a consistent quantum theory of gravity, its formal brane amplitudes have the right properties to be actual branes. The main datum of the domestic geometry of a 4d SUGRA is its gauge coupling, seen as a map from a manifold which satisfies the geometric Ooguri-Vafa conjectures to the Siegel variety; to understand the properties of the quantum-consistent gauge couplings we discuss several novel aspects of such `Ooguri-Vafa' manifolds, including their Liouville properties. Our second goal is to present some novel speculation on the extension of the swampland program to no-supersymmetric effective theories of gravity. The idea is that the domestic geometric description of the quantum-consistent effective theories extends, possibly with some qualifications, also to the non-supersymmetric case.

80 pages, several clarifications and improvements required by the referee; section 7.3 rewritten to include proofs of uniqueness; more references

References in corpus (9)

• On the Geometry of the String Landscape and the Swampland
• Symmetries and Strings in Field Theory and Gravity
• The Swampland: Introduction and Review
• The String Landscape and the Swampland
• Ricci Flow and the Poincare Conjecture
• The chiral ring of AdS3/CFT2 and the attractor mechanism
• On the Hodge Metric of the Universal Deformation Space of Calabi-Yau Threefolds
• The duality covariant geometry and DSZ quantization of abelian gauge theory
• An introduction to arithmetic groups

Cited by in corpus (4)

• Compactness of Brane Moduli and the String Lamppost Principle in $d>6$
• Taming the Landscape of Effective Theories
• Bulk Reconstruction in Moduli Space Holography
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme