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Content archived on 2024-05-29

Super string vacua from super gravity

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 (EuroSciVoc)

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Topic(s)

Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.

Call for proposal

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FP6-2002-MOBILITY-11
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Funding Scheme

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ERG - Marie Curie actions-European Re-integration Grants

Coordinator

POLITECNICO DI TORINO
EU contribution
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Total cost

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