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Gauged Supergravities, de Sitter Space and Cosmology
Renata Kallosh, Andrei Linde, Sergey Prokushkin +1
We have studied scalar potentials V of gauged N=8,4,2 supergravities in d=4. Extrema of these potentials may correspond to de Sitter, anti de Sitter and Minkowski vacua. All de Sit…
String Theory and Hybrid Inflation/Acceleration
Carlos Herdeiro, Shinji Hirano, Renata Kallosh
We find a description of hybrid inflation in (3+1)-dimensions using brane dynamics of Hanany-Witten type. P-term inflation/acceleration of the universe with the hybrid potential ha…
N=2 Supersymmetry and de Sitter space
Renata Kallosh
We present a (unique?) possibility of de Sitter solution in the framework of N=2 supersymmetry (hypersymmetry). We show that a model with a vector and a charged hypermultiplet has…
Domain Walls with Strings Attached
Renata Kallosh, Sergey Prokushkin, Marina Shmakova
We have constructed a bulk & brane action of IIA theory which describes a pair of BPS domain walls on S_1/Z_2, with strings attached. The walls are given by two orientifold O8-plan…
BPS Branes in Cosmology
Renata Kallosh, Lev Kofman, Andrei Linde +1
The possibility to study the M/string theory cosmology via 5d bulk & brane action is investigated. The role of the 4-form field in the theory of BPS branes in 5d is clarified. We d…
Brane plus Bulk Supersymmetry in Ten Dimensions
E. Bergshoeff, R. Kallosh, T. Ortin +2
We discuss a generalized form of IIA/IIB supergravity depending on all R-R potentials C^(p) (p=0,1,...,9) as the effective field theory of Type IIA/IIB superstring theory. For the…