Post-inflation increase of the cosmological tensor-to-scalar perturbation ratio

Details Post-inflation increase of the cosmological tensor-to-scalar perturbation ratio Post-inflation increase of the cosmological tensor-to-scalar perturbation ratio

2005-07-25

arxiv.org/abs/astro-ph/0507573v3

Mod.Phys.Lett.A20:3077-3084,2005

Astronomy and Astrophysics

Astrophysics

4-page latex file with NO figures. We would like to thank M. Sloth for very useful correspondence about his related paper and

Scientific paper

10.1142/S0217732305019122

We investigate the possibility that the amplitude of scalar density perturbations may be damped after inflation. This would imply that CMB anisotropies do not uniquely fix the amplitude of the perturbations generated during inflation and that the present tensor-to-scalar ratio might be larger than produced in inflation, increasing the prospects of detection of primordial gravitational radiation. It turns out, however, that the damping of density perturbations is hard to achieve.

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