The fate of classical tensor inhomogeneities in pre-big-bang string cosmology
Alessandra Buonanno, Thibault Damour
Abstract
In pre-big-bang string cosmology one uses a phase of dilaton-driven inflation to stretch an initial (microscopic) spatial patch to the (much larger) size of the big-bang fireball. We show that the dilaton-driven inflationary phase does not naturally iron out the initial classical tensor inhomogeneities unless the initial value of the string coupling is smaller than 10(-35).
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