Perturbation Growth in Anisotropic Cosmologies

Details Perturbation Growth in Anisotropic Cosmologies Perturbation Growth in Anisotropic Cosmologies

2008-03-17

arxiv.org/abs/0803.2490v3

JHEP 0807:045,2008

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, published version

Scientific paper

10.1088/1126-6708/2008/07/045

We study the growth of perturbations in an expanding Bianchi type-I metric that evolves according to an energy density that includes dust and a cosmological constant. Assuming an epoch where the cosmological constant is subdominant, we find that, for a reasonably large set of initial conditions, the metric fluctuations grow fast enough to make the metric inhomogeneous before the cosmological constant becomes the dominant form of energy. We have examined values for the cosmological constant that are in the interval $10^{10} {GeV}$ to $10^{16} {GeV}$.

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