Objective Recent developments in theoretical high-energy research have provided new unifying descriptions of gauge theories and gravity. These scenarios typically correspond to non-perturbative solutions of super-string theory describing compactifications from ten t o four dimensions in presence of suitable fluxes and space-filling D-branes. Fluxes indeed can stabilize the dilaton, solving therefore an open problem in heterotic string phenomenology. In this framework gauge theories are defined on the world-volume of t he D-branes while gravity propagates in all dimensions. Since the dilaton is generally fixed at a non-perturbative value, super-string theory cannot help to deduce the low-energy dynamics around these backgrounds.On the other hand important results in this direction were achieved using the supergravity approach. In most cases of interest indeed the low-energy dynamics of string theory on these solutions could be thoroughly described as spontaneously broken phases of a "gauged" extended super-gravity in which the effective theory has a typical "no-scale" structure. The main purpose of this project is two-fold: use the super-gravity framework to construct models describing the low-energy limit of Type IIB compactifications on orientifolds in presence of fluxes and D-branes, and to study their phenomenological implications; understand the microscopic interpretation of certain super-gravity vacua, like those with positive cosmological constant (the candidate researcher has indeed contributed to the construction of the only known example of extended super-gravity model with a stable de Sitter vacuum) which are particularly relevant to cosmology but do not have a super-string description yet. Fields of science natural sciencesphysical sciencesquantum physicsnatural sciencesphysical sciencestheoretical physicsstring theorynatural sciencesphysical sciencesastronomyphysical cosmology Programme(s) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Topic(s) MOBILITY-4.1 - Marie Curie European Reintegration Grants (ERG) Call for proposal FP6-2002-MOBILITY-11 See other projects for this call Funding Scheme ERG - Marie Curie actions-European Re-integration Grants Coordinator POLITECNICO DI TORINO EU contribution No data Address Corso Duca degli Abruzzi 24 TORINO Italy See on map Links Website Opens in new window Total cost No data
