Instantons on manifolds of exceptional holonomy

Summary

Instantons are connections on vector bundles over Riemannian manifolds that minimise a natural functional (the Yang-Mills functional). They were first studied by theoretical physicists in the context of gauge theories that form part of the standard model, but soon attracted the interest of differential geometers, leading to spectacular insights into four-manifold topology, amongst other developments.

The goal of this project is to study instantons on manifolds with exceptional holonomy -- more precisely, Riemannian manifolds of dimension seven or eight with holonomy contained in G2 or Spin(7). This area of research is motivated by efforts to extend successful work with four-manifolds, and by problems arising in string theory and other areas of mathematical physics. Possible directions include constructing examples (using techniques from analysis, group theory or elsewhere) and studying the moduli spaces of instantons.

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