N=2 supergravity models with stable de Sitter vacua

Abstract

In the present talk I shall review the construction of N=2 supergravity models exhibiting stable de Sitter vacua. These solutions represent the first instance of stable backgrounds with positive cosmological constant in the framework of extended supergravities (N >=2). After briefly reviewing the role of de Sitter space--times in inflationary cosmology, I shall describe the main ingredients which were necessary for the construction of gauged N=2 supergravity models admitting stable solutions of this kind.

arXiv commentPrepared for Workshop on the Quantum Structure of Spacetime and the Geometric Nature of Fundamental Interactions, Leuven, Belgium, September 13-19 2002

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• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
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• Ghost-Free de Sitter Supergravities as Consistent Reductions of String and M-theory
• dS${}_2$ Supergravity
• Stable de Sitter Vacua in 4 Dimensional Supergravity Originating from 5 Dimensions
• Duality invariance in Fayet-Iliopoulos gauged supergravity
• A General Study of Ground States of N=2 Supergravity Theories with Symmetric Scalar Manifolds in 5 Dimensions