Brane-World Inflation and the Transition to Standard Cosmology

Details Brane-World Inflation and the Transition to Standard Cosmology Brane-World Inflation and the Transition to Standard Cosmology

2001-06-20

arxiv.org/abs/hep-th/0106190v2

JHEP 0109:020,2001

Physics

High Energy Physics

High Energy Physics - Theory

50 pages, 3 figures, minor typos corrected

Scientific paper

10.1088/1126-6708/2001/09/020

In the context of a five-dimensional brane-world model motivated from heterotic M-theory, we develop a framework for potential-driven brane-world inflation. Specifically this involves a classification of the various background solutions of (A)dS_5 type, an analysis of five-dimensional slow-roll conditions and a study of how a transition to the flat vacuum state can be realized. It is shown that solutions with bulk potential and both bane potentials positive exist but are always non-separating and have a non-static orbifold. It turns out that, for this class of backgrounds, a transition to the flat vacuum state during inflation is effectively prevented by the rapidly expanding orbifold. We demonstrate that such a transition can be realized for solutions where one boundary potential is negative. For this case, we present two concrete inflationary models which exhibit the transition explicitly.

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