On the Cosmology of Type IIA Compactifications on SU(3)-structure Manifolds

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dc.creatorCaviezel, Claudio
dc.creatorKoerber, Paul
dc.creatorKors, Simon
dc.creatorLust, Dieter
dc.creatorWrase, Timm
dc.creatorZagermann, Marco
dc.date2008-12-18
dc.date2009-01-09
dc.date.accessioned2026-07-07T13:04:48Z
dc.date.available2026-07-07T13:04:48Z
dc.descriptionWe study cosmological properties of type IIA compactifications on orientifolds of SU(3)-structure manifolds with non-vanishing geometric flux. These compactifications give rise to effective 4D N=1 supergravity theories that do not fall under some recently-proven no-go theorems against de Sitter vacua and slow-roll inflation. Focusing on a well-understood class of models based on coset spaces, however, we can use a refined no-go theorem that rules out de Sitter vacua and slow-roll inflation in all but one case. The refined no-go theorem uses the dilaton and a specific linear combination of the Kaehler moduli, which is different from the overall volume modulus. It puts a lower bound on the first slow-roll parameter: epsilon>=2. The only case not ruled out is the manifold SU(2)x SU(2), for which we indeed find critical points with epsilon numerically zero. However, all the points we could find have a tachyon corresponding to an eta-parameter eta<= -2.4.
dc.descriptionLaTeX, 22 pages plus appendix; v2: references added, minor changes
dc.identifierhttps://arxiv.org/abs/0812.3551
dc.identifierhttp://arxiv.org/abs/0812.3551
dc.identifierJHEP 0904:010,2009
dc.identifierdoi:10.1088/1126-6708/2009/04/010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227295
dc.subjectHigh Energy Physics - Theory
dc.titleOn the Cosmology of Type IIA Compactifications on SU(3)-structure Manifolds
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