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Zawartość zarchiwizowana w dniu 2024-05-29

Super string vacua from super gravity

Cel

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.

Dziedzina nauki (EuroSciVoc)

Temat(-y)

Zaproszenie do składania wniosków

FP6-2002-MOBILITY-11
Zobacz inne projekty w ramach tego zaproszenia

System finansowania

ERG - Marie Curie actions-European Re-integration Grants

Koordynator

POLITECNICO DI TORINO
Wkład UE
Brak danych
Koszt całkowity
Brak danych