Power-law cosmologies in minimal and maximal gauged supergravity
J. Bl{\aa}b\"ack, A. Borghese, S. S. Haque
TL;DR
This paper explores power-law and ekpyrotic solutions in minimal and maximal four-dimensional supergravity models, discovering new solutions but no new accelerating solutions.
Contribution
It identifies new ekpyrotic solutions in minimal supergravity and new generic power-law solutions in maximal supergravity, expanding the solution space.
Findings
New ekpyrotic solutions in minimal supergravity
New generic power-law solutions in maximal supergravity
No new accelerating solutions found
Abstract
In this paper we search for accelerating power-law solutions and ekpyrotic solutions within minimal and maximal four dimensional supergravity theories. We focus on the STU model for N=1 and on the new CSO(p,q,r) theories, which were recently obtained exploiting electromagnetic duality, for N=8. In the minimal case we find some new ekpyrotic solutions, while in the maximal case we find some new generic power-law solutions. We do not find any new accelerating solutions for these models.
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Cosmology and Gravitation Theories · Noncommutative and Quantum Gravity Theories