Some Aspects of Brane Inflation

Details Some Aspects of Brane Inflation Some Aspects of Brane Inflation

2001-06-28

arxiv.org/abs/hep-th/0106274v2

Phys.Lett.B516:421-430,2001

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 1 figure, references added, minor typos corrected

Scientific paper

10.1016/S0370-2693(01)00950-9

The inflaton potential in four-dimensional theory is rather arbitrary, and fine-tuning is required generically. By contrast, inflation in the brane world scenario has the interesting feature that the inflaton potential is motivated from higher dimensional gravity, or more generally, from bulk modes or string theory. We emphasize this feature with examples. We also consider the impact on the spectrum of density perturbation from a velocity-dependent potential between branes in the brane inflationary scenario. It is likely that such a potential can have an observable effect on the ratio of tensor to scalar perturbations.

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