Special Holonomy and Two-Dimensional Supersymmetric Sigma-Models
arXiv:hep-th/0611255
Abstract
Two-dimensional sigma-models describing superstrings propagating on manifolds of special holonomy are characterized by symmetries related to covariantly constant forms that these manifolds hold, which are generally non-linear and close in a field dependent sense. The thesis explores various aspects of the special holonomy symmetries.
PhD thesis, 149 pages; King's College London, 2006