The cosmological slingshot scenario: A stringy early times universe

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dc.contributor.author Germani, C en
dc.contributor.author Grandi, N en
dc.contributor.author Kehagias, A en
dc.date.accessioned 2014-03-01T01:29:18Z
dc.date.available 2014-03-01T01:29:18Z
dc.date.issued 2008 en
dc.identifier.issn 0264-9381 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/19216
dc.subject Big Bang en
dc.subject Energy Conditions en
dc.subject Indexation en
dc.subject Turning Point en
dc.subject Angular Momentum en
dc.subject calabi yau en
dc.subject High Energy Density en
dc.subject.classification Astronomy & Astrophysics en
dc.subject.classification Physics, Multidisciplinary en
dc.subject.classification Physics, Particles & Fields en
dc.subject.other D=10 SUPERGRAVITY en
dc.subject.other BRANE INFLATION en
dc.subject.other COMPACTIFICATION en
dc.subject.other GRAVITY en
dc.subject.other DIMENSIONS en
dc.subject.other MILLIMETER en
dc.subject.other N=2 en
dc.title The cosmological slingshot scenario: A stringy early times universe en
heal.type journalArticle en
heal.identifier.primary 10.1088/0264-9381/25/13/135004 en
heal.identifier.secondary http://dx.doi.org/10.1088/0264-9381/25/13/135004 en
heal.identifier.secondary 135004 en
heal.language English en
heal.publicationDate 2008 en
heal.abstract A cosmological model for the early time universe is proposed. In this model, the universe is a wandering brane moving in a warped throat of a Calabi-Yau space. A nonzero angular momentum induces a turning point in the brane trajectory, and leads to a bouncing cosmology as experienced by an observer living on the brane. The universe undergoes a decelerated contraction followed by an accelerating expansion and no big-bang singularity. Although the number of e-folds of accelerated motion is low (less than 2), standard cosmological problems are not present in our model; thanks to the absence of an initial singularity and the violation of energy conditions of mirage matter at high energies. Density perturbations are also calculated in our model and we find a slightly red spectral index with negligible tensorial perturbations in compatibility with WMAP data. © 2008 IOP Publishing Ltd. en
heal.publisher IOP PUBLISHING LTD en
heal.journalName Classical and Quantum Gravity en
dc.identifier.doi 10.1088/0264-9381/25/13/135004 en
dc.identifier.isi ISI:000256841400004 en
dc.identifier.volume 25 en
dc.identifier.issue 13 en

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