Old Inflation in String Theory

Details Old Inflation in String Theory Old Inflation in String Theory

2004-01-05

arxiv.org/abs/hep-th/0401004v2

JHEP 0407 (2004) 052

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, 3 figures; typos corrected and reference added

Scientific paper

10.1088/1126-6708/2004/07/052

We propose a stringy version of the old inflation scenario which does not require any slow-roll inflaton potential and is based on a specific example of string compatification with warped metric. Our set-up admits the presence of anti-D3-branes in the deep infrared region of the metric and a false vacuum state with positive vacuum energy density. The latter is responsible for the accelerated period of inflation. The false vacuum exists only if the number of anti-D3-branes is smaller than a critical number and the graceful exit from inflation is attained if a number of anti-D3-branes travels from the ultraviolet towards the infrared region. The cosmological curvature perturbation is generated through the curvaton mechanism.

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