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Geometrical Tachyon Inflation in the Presence of a Bulk Tachyon Field

Vassilios Zamarias
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Abstract

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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Vassilios Zamarias. 2006-10-05. Geometrical Tachyon Inflation in the Presence of a Bulk Tachyon Field. https://arxiv.org/abs/hep-th/0610063

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