The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology

Journal Article · Mon Jul 28 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2972004· OSTI ID:21149230

Germani, Cristiano ^[1]; Grandi, Nicolas ^[2]; Kehagias, Alex ^[3]

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1. SISSA and INFN--via Beirut 4, 34014 Trieste (Italy)
2. IFLP, CCT La Plata, CONICET-Dto. de Fisica, UNLP Casilla de Correos 67, CP1900 La Plata (Argentina)
3. Department of Physics, National Technical University of Athens GR-15773, Zografou, Athens (Greece)

In The Cosmological Slingshot Scenario, our Universe is a D3-brane that extends in the 4d noncompact directions of a warped Calabi-Yau compactification of IIB Supergravity. Early time cosmology corresponds to a period in which the brane moves inside a warped throat, a non-vanishing angular momentum ensuring that the trajectory of the brane has a turning point. The corresponding induced metric on the D3-brane experiences a cosmological evolution with a bounce. In this framework, the homogeneity, flatness, and isotropy problems of standard cosmology might be avoided. The power spectrum of primordial perturbations of the brane embedding can be found and it is shown to be in agreement to WMAP data.

• OSTI ID: 21149230
• Journal Information: AIP Conference Proceedings, Vol. 1031, Issue 1; Conference: Conference on ten years of ADS/CFT, Buenos Aires (Argentina), 19-21 Dec 2007; Other Information: DOI: 10.1063/1.2972004; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BRANES
COMPACTIFICATION
COSMOLOGY
DISTURBANCES
ENERGY SPECTRA
ISOTROPY
STRING MODELS
STRING THEORY
SUPERGRAVITY
UNIVERSE