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Linear perturbations in brane gas cosmology

Scott Watson
(
- Brown U.
)
,
Robert Brandenberger
(
- Brown U.
)

Dec, 2003

17 pages

Published in:

JHEP 03 (2004) 045

e-Print:

hep-th/0312097 [hep-th]

DOI:

10.1088/1126-6708/2004/03/045

Report number:

BROWN-HET-1382

View in:

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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

References(21)

Figures(0)

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