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- Title
The Cosmological Slingshot Scenario in details.
- Authors
Cristiano Germani; Nicolás Grandi; Alex Kehagias
- Abstract
Abstract  We generalize the Cosmological Slingshot Scenario for a Slingshot brane moving in a KlebanovâStrassler 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.
- Subjects
METAPHYSICAL cosmology; BRANES; QUANTUM perturbations; ANGULAR momentum (Nuclear physics); MONOTONIC functions; EINSTEIN field equations; QUANTUM theory
- Publication
General Relativity & Gravitation, 2010, Vol 42, Issue 1, p77
- ISSN
0001-7701
- Publication type
Article
- DOI
10.1007/s10714-009-0819-5