Assisted inflation via tachyon condensation

Details Assisted inflation via tachyon condensation Assisted inflation via tachyon condensation

2001-07-05

arxiv.org/abs/hep-ph/0107058v2

Nucl.Phys. B614 (2001) 101-116

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX file, 10 pages, three figures included. Minor changes, small clarification added in section II. Final version

Scientific paper

10.1016/S0550-3213(01)00410-2

In this paper we propose a new mechanism of inflating the Universe with non-BPS $D4$ branes which decay into stable $D3$ branes via tachyon condensation. In a single brane scenario the tachyon potential is very steep and unable to support inflation. However if the universe lives in a stack of branes produced by a set of non-interacting unstable $\tilde {D4}$ branes, then the associated set of tachyons may drive inflation along our 3 spatial dimensions. After tachyon condensation the Universe is imagined to be filled with a set of parallel stable $D3$ branes. We study the scalar density perturbations and reheating within this setup.

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