Cosmological Evolution of a Brane Universe in a Type 0 String Background

Details Cosmological Evolution of a Brane Universe in a Type 0 String Background Cosmological Evolution of a Brane Universe in a Type 0 String Background

2001-11-06

arxiv.org/abs/hep-th/0111052v1

Physics

High Energy Physics

High Energy Physics - Theory

Extended version of a poster presented at the 10th Tohwa International Symposium on String Theory in Fukuoka, Japan, to be pub

Scientific paper

We study the cosmological evolution of a D3-brane Universe in a type 0 string background. We follow the brane universe along the radial coordinate of the background and we calculate the energy density which is induced on the brane because of its motion in the bulk. For constant values of tachyon and dilaton an inflationary phase is appearing. For non constant values of tachyon and dilaton and for a particular range of values of the scale factor of the brane-universe, the effective energy density is dominated by a term proportional to $\frac{1}{(\log\alpha)^{4}}$ indicating a slowly varying inflationary phase.

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