Dilaton-driven brane inflation in type IIB string theory

Details Dilaton-driven brane inflation in type IIB string theory Dilaton-driven brane inflation in type IIB string theory

2000-04-24

arxiv.org/abs/hep-th/0004155v2

Phys.Rev. D62 (2000) 065002

Physics

High Energy Physics

High Energy Physics - Theory

typos corrected, reference added, version to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.62.065002

We consider the cosmological evolution of the three-brane in the background of type IIB string theory. For two different backgrounds which give nontrivial dilaton profile we have derived the Friedman-like equations. These give the cosmological evolution which is similar to the one by matter density on the universe brane. The effective density blows up as we move towards the singularity showing the initial singularity problem. The analysis shows that when there is axion field in the ambient space the recollapsing of the universe occurs faster compared with the case without axion field.

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