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

Abstract

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. We find that for some typical values of the parameters 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 $\frac{1}{(loga{)}^4}$ indicating a slow varying inflationary phase. For larger values of the scale factor the effective energy density takes a constant value and the brane-universe enters its usual inflationary period.

25 pages,1 figure,LaTex file,final version to appear in Phys. Rev. D

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• The Cosmological Slingshot Scenario: A Stringy Early Times Universe
• Geometrical Tachyon Dynamics in the Background of a Bulk Tachyon Field
• Brane Cosmology in the Background of D-Brane with NS B Field
• Constraints on tachyon inflationary models with an AdS/CFT correspondence
• AdS/CFT Correspondence and the Reheating of the Brane-Universe
• Probing the Holography of Near-Horizon AdS(5)xS(5) Geometry
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• Stability and fluctuation modes of giant gravitons with NSNS B field
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• Power-law cosmological solution derived from DGP brane with a brane tachyon field
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• Probe Branes Dynamics in Nonconstant Background Fields
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• D3/D7 Inflation in a Type-0B String Background