Geometrical Tachyon Inflation in the Presence of a Bulk Tachyon Field

Details Geometrical Tachyon Inflation in the Presence of a Bulk Tachyon Field Geometrical Tachyon Inflation in the Presence of a Bulk Tachyon Field

2006-10-05

arxiv.org/abs/hep-th/0610063v1

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, 2 figures, talk presented at the "Brane-world Gravity: Progress and Problems" meeting and workshop, 18th - 29th Septe

Scientific paper

We present the study of the dynamics of the geometrical tachyon field on an unstable D3-brane in the background of a bulk tachyon field of a D3-brane solution of Type-0 string theory. We find that the geometrical tachyon potential is modified by a function of the bulk tachyon and inflation occurs at weak string coupling, where the bulk tachyon condenses, near the top of the geometrical tachyon potential. We also find a late accelerating phase when the bulk tachyon asymptotes to zero and the geometrical tachyon field reaches the minimum of the potential.

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