D-brane Inflation

Details D-brane Inflation D-brane Inflation

2001-05-21

arxiv.org/abs/hep-th/0105203v1

Physics

High Energy Physics

High Energy Physics - Theory

Talk given by Q.S. at the workshop in Heidelberg (April 4-7, 2001), and at the EURESCO conference in Le Londe (France) May 11-

Scientific paper

We discuss a calculable version of brane inflation, in which a set of parallel D-brane and anti-D-brane worlds, initially displaced in extra dimension, slowly attract each other. In the effective four-dimensional theory this slow motion of branes translates into a slow-roll of a scalar field (proportional to their separation) with a flat potential that drives inflation. The number of possible e-foldings is severely constrained. The scalar spectral index is found to be 0.97, while the effective compactification scale is of order $10^{12}$ GeV. Reheating of the Universe is provided by collision and subsequent annihilation of branes.

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