K-Bounce

Details K-Bounce K-Bounce

2007-05-20

arxiv.org/abs/0705.2893v2

JCAP0709:001,2007

Astronomy and Astrophysics

Astrophysics

Replaced with version accepted to JCAP

Scientific paper

10.1088/1475-7516/2007/09/001

By demanding that a bounce is nonsingular and that perturbations are well-behaved at all times, we narrow the scope of possible models with one degree of freedom that can describe a bounce in the absence of spatial curvature. We compute the general properties of the transfer matrix of perturbations through the bounce, and show that spectral distortions of the Bardeen potential $\Phi$ are generically produced only for the small wavelengths, although the spectrum of long wavelength curvature perturbations produced in a contracting phase gets propagated unaffected through such a bounce.

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