"Phantom" Inflation in Warped Compactification

Details "Phantom" Inflation in Warped Compactification "Phantom" Inflation in Warped Compactification

2007-12-20

arxiv.org/abs/0712.3328v3

Phys.Rev.D78:023518,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 2 figures, some arguments on the reliability of our resulits added, ref. added, to publish in PRD, matched to publish

Scientific paper

10.1103/PhysRevD.78.023518

In this paper, in a class of warped compactifications with the brane/flux annihilation, we find that the inflation may be driven by a flat direction identified as that along the number p of anti D3-branes located at the tip of the Klebanov-Strassler throat. The spectrum of adiabatic perturbation generated during inflation is nearly scale invariant, which may be obtained by using the results shown in the phantom inflation, since in a four-dimension effective description the evolution of energy density along the $p$ direction is slowly increasing.

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