Stability Analysis of Anisotropic Inflationary Cosmology

Details Stability Analysis of Anisotropic Inflationary Cosmology Stability Analysis of Anisotropic Inflationary Cosmology

2001-04-11

arxiv.org/abs/hep-th/0104101v2

Phys.Rev. D64 (2001) 124019

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, some comment added

Scientific paper

10.1103/PhysRevD.64.124019

The stability analysis of an anisotropic inflationary universe of the four dimensional Neveu-Schwarz--Neveu-Schwarz string model with a nonvanishing cosmological constant is discussed in this paper. The accelerating expansion solution found earlier is shown to be stable against the perturbations with respect to the dilaton and axion fields once the dilaton field falls close to the local minimum of the symmetry-breaking potential. This indicates that the Bianchi I space tends to evolve to an isotropic flat Friedmann-Robertson-Walker space. This expanding solution is also shown to be stable against the perturbation with respect to anisotropic spatial directions.

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