Linear Cosmological Perturbations in D-brane Gases

Details Linear Cosmological Perturbations in D-brane Gases Linear Cosmological Perturbations in D-brane Gases

2005-02-15

arxiv.org/abs/hep-th/0502133v2

JHEP 0503 (2005) 003

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, v2: minor changes, references added, to appear in JHEP

Scientific paper

10.1088/1126-6708/2005/03/003

We consider linear cosmological perturbations on the background of a D-brane gas in which the compact dimensions and the dilaton are stabilized. We focus on long wavelength fluctuations and find that there are no instabilities. In particular, the perturbation of the internal space performs damped oscillations and decays in time. Therefore, the stabilization mechanism based on D-brane gases in string theory remains valid in the presence of linearized inhomogeneities.

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