Graceful exit via polymerization of pre-big-bang cosmology

G. De Risi, Roy Maartens, P. Singh

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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 nonperturbative 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.
Original languageEnglish
Pages (from-to)103531
Number of pages1
JournalPhysical Review D
Issue number10
Publication statusPublished - 29 Nov 2007


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