Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-08-04
Physics
High Energy Physics
High Energy Physics - Theory
DPhil Thesis at the University of Sussex. 188pp. v2:References added
Scientific paper
In this thesis we study compactifications of type II string theories and M-theory to four dimensions. We construct the four-dimensional N=2 supergravities that arise from compactifications of type IIA string theory and M-theory on manifolds with SU(3)-structure. We then study their potential for moduli stabilisation and give explicit examples where all the moduli are stabilised. We also study the effective action for type IIB conifold transitions on Calabi-Yau manifolds. We find that, although there are small regions in phase space that lead to a completed transition, generically the moduli are classically trapped at the conifold point thereby halting the transition.
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