Harmonic forms on asymptotically ADS metrics

Guido Franchetti, Raúl Sánchez Galán

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper we study the rotationally invariant harmonic cohomology of a two-parameter family of Einstein metrics g which admits a cohomogeneity one action of SU(2) × U(1) and has AdS asymptotics. Depending on the values of the parameters, g is either of NUT type, if the fixed-point locus of the U(1) action is zero-dimensional, or of bolt type, if it is two-dimensional. We find that if g is of NUT type then the space of SU(2)-invariant harmonic two-forms is three-dimensional and consists entirely of self-dual forms; if g is of bolt type it is four-dimensional. In both cases we explicitly determine a basis. The pair (g, F) for F a self-dual harmonic two-form is also a solution of the bosonic sector of 4D supergravity. We determine for which choices it is a supersymmetric solution and the amount of preserved supersymmetry.

Original languageEnglish
Article number385205
JournalJournal of Physics A: Mathematical and Theoretical
Volume55
Issue number38
Early online date31 Aug 2022
DOIs
Publication statusPublished - 23 Sep 2022

Keywords

  • harmonic cohomology
  • Killing spinors
  • supergravity

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Modelling and Simulation
  • Mathematical Physics
  • Physics and Astronomy(all)

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