Linear perturbations in brane gas cosmology

Dec, 2003
17 pages
Published in:
  • JHEP 03 (2004) 045
e-Print:
Report number:
  • BROWN-HET-1382

Citations per year

20042006200820102011024681012
Abstract:
We consider the effect of string inhomogeneities on the time dependent background of Brane Gas Cosmology. We derive the equations governing the linear perturbations of the dilaton-gravity background in the presence of string matter sources. We focus on long wavelength fluctuations and find that there are no instabilities. Thus, the predictions of Brane Gas Cosmology are robust against the introduction of linear perturbations. In particular, we find that the stabilization of the extra dimensions (moduli) remains valid in the presence of dilaton and string perturbations.
  • string model
  • effective action
  • gravitation
  • field theory: scalar
  • membrane model
  • membrane: gas
  • background field
  • fluctuation
  • moduli space
  • cosmological model