Stefan Vandoren, Utrecht University
Quaternion-Kahler geometry from string theory

Quaternion-Kahler geometry appears in the hypermultiplet sector of $N=2$ supergravity, and is obtained e.g. by compactifying type II string theory on Calabi-Yau manifolds. In this talk, we discuss the status of finding the instanton corrections to the quaternionic hypermultiplet moduli space using twistor space techniques.