Low-energy graceful exit in anisotropic string cosmology backgrounds

Details Low-energy graceful exit in anisotropic string cosmology backgrounds Low-energy graceful exit in anisotropic string cosmology backgrounds

2001-09-18

arxiv.org/abs/hep-th/0109137v1

Phys.Lett. B521 (2001) 335-342

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, latex, 2 figures included using epsfig

Scientific paper

10.1016/S0370-2693(01)01201-1

We discuss the possibility of a smooth transition from the pre- to the post-big bang regime, in the context of the lowest-order string effective action (without higher-derivative corrections), taking into account with a phenomenological model of source the repulsive gravitational effects due to the back-reaction of the quantum fluctuations outside the horizon. We determine a set of necessary conditions for a successful and realistic transition, and we find that such conditions can be satisfied (by an appropriate model of source), provided the background is higher-dimensional and anisotropic.

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