The graceful exit in pre-big bang string cosmology

Details The graceful exit in pre-big bang string cosmology The graceful exit in pre-big bang string cosmology

1999-10-21

arxiv.org/abs/hep-th/9910169v3

JHEP0001:035,2000

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, 6 figures, JHEP class. Added new section on the classical correction and references

Scientific paper

10.1088/1126-6708/2000/01/035

We re-examine the graceful exit problem in the pre-big bang scenario of string cosmology, by considering the most general time-dependent classical correction to the Lagrangian with up to four derivatives. By including possible forms for quantum loop corrections we examine the allowed region of parameter space for the coupling constants which enable our solutions to link smoothly the two asymptotic low-energy branches of the pre-big bang scenario, and observe that these solutions can satisfy recently proposed entropic bounds on viable singularity free cosmologies.

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