|Speaker:||Johannes Schmude (IPMU)|
|Title:||G-structures and calibrations in supergravity and steps towards SUSY breaking on the conifold|
|Date (JST):||Tue, Dec 07, 2010, 13:15 - 14:45|
|Place:||Seminar Room A|
The study of supergravity backgrounds as relevant to string compactification and gauge/string duality can often be simplified using the language of G-structures and generalized calibrations. Roughly speaking, the former are a natural extension of special holonomy arguments to backgrounds with fluxes, while the latter provide an efficient way for dealing with additional D-brane sources.
In this talk we will review these concepts, paying special attention to the case of 4-dim N=1 type II backgrounds, where the relevant G-structure is an SU(3) x SU(3) structure on the generalized tangent bundle.
As it turns out, such structures are not only applicable to the study of N=1 solutions, but also allow for the construction of N=0 backgrounds. We will apply this formalism to the construction of a SUSY-breaking IIB solution based on the Klebanov-Witten background.