The cosmological slingshot scenario in details

Germani, C; Grandi, NE; Kehagias, A

dc.contributor.author	Germani, C	en
dc.contributor.author	Grandi, NE	en
dc.contributor.author	Kehagias, A	en
dc.date.accessioned	2014-03-01T01:58:50Z
dc.date.available	2014-03-01T01:58:50Z
dc.date.issued	2009	en
dc.identifier.issn	00017701	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28747
dc.subject	Branes	en
dc.subject	Early-time cosmology	en
dc.subject	Einstein-Jordan frames	en
dc.title	The cosmological slingshot scenario in details	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10714-009-0819-5	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10714-009-0819-5	en
heal.publicationDate	2009	en
heal.abstract	We generalize the Cosmological Slingshot Scenario for a Slingshot brane moving in a Klebanov-Strassler throat. We show that the horizon and isotropy problems of standard cosmology are avoided, while the flatness problem is acceptably alleviated. Regarding the primordial perturbations, we identify their vacuum state and elucidate the evolution from the quantum to the classical regimes. Also, we calculate their exact power spectrum showing its compatibility with current data. We discuss the bouncing solution from a four dimensional point of view. In this framework the radial and angular motion of the Slingshot brane are described by two scalar fields. We show that the bouncing solution for the scale factor in String frame is mapped into a monotonically increasing (in conformal time) solution in the Einstein frame. We finally discuss about the regularity of the geometry in Einstein frame. © Springer Science+Business Media, LLC 2009.	en
heal.journalName	General Relativity and Gravitation	en
dc.identifier.doi	10.1007/s10714-009-0819-5	en
dc.identifier.volume	42	en
dc.identifier.issue	1	en
dc.identifier.spage	77	en
dc.identifier.epage	101	en