Classical Inhomogeneities in String Cosmology

Details Classical Inhomogeneities in String Cosmology Classical Inhomogeneities in String Cosmology

1997-06-30

arxiv.org/abs/hep-th/9706221v2

Phys.Rev. D57 (1998) 2543-2556

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, Revtex, 1 figure included, epsfig.sty needed; one reference added

Scientific paper

10.1103/PhysRevD.57.2543

We generalize previous work on inhomogeneous pre-big bang cosmology by including the effect of non-trivial moduli and antisymmetric-tensor/axion fields. The general quasi-homogeneous asymptotic solution---as one approaches the big bang singularity from perturbative initial data---is given and its range of validity is discussed, allowing us to give a general quantitative estimate of the amount of inflation obtained during the perturbative pre-big bang era. The question of determining early-time ``attractors'' for generic pre-big bang cosmologies is also addressed, and a motivated conjecture is advanced. We also discuss S-duality-related features of the solutions, and speculate on the way an asymptotic T-duality symmetry may act on moduli space as one approaches the big bang.

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