Graceful exit via polymerization of pre-big bang cosmology

Details Graceful exit via polymerization of pre-big bang cosmology Graceful exit via polymerization of pre-big bang cosmology

2007-06-25

arxiv.org/abs/0706.3586v2

Phys.Rev.D76:103531,2007

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, 8 figures. Some clarifications added. To appear on Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.103531

We consider a phenomenological modification of the Pre Big Bang scenario using ideas from the resolution of curvature singularities in Loop Quantum Cosmology. We show that non-perturbative Loop modifications to the dynamics, arising from the underlying polymer representation, can resolve the graceful exit problem. The curvature and the dilaton energy stay finite at all times, in both the string and Einstein frames. In the string frame, the dilaton tends to a constant value at late times after the bounce.

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