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arXiv:astro-ph/0507573 (astro-ph)
[Submitted on 25 Jul 2005 (v1), last revised 10 Sep 2005 (this version, v3)]

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

Authors:N. Bartolo, Edward W. Kolb, A. Riotto
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Abstract: 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.
Comments: 4-page latex file with NO figures. We would like to thank M. Sloth for very useful correspondence about his related paper and for readily pointing out an error in the first version of our draft. We thank A. Linde, D. Lyth, S. Mukhanov L. McAllister, M. Sasaki and D. Wands for useful comments and criticisms
Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)
Report number: FERMILAB-PUB-05-335-A
Cite as: arXiv:astro-ph/0507573
  (or arXiv:astro-ph/0507573v3 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0507573
Journal reference: Mod.Phys.Lett.A20:3077-3084,2005
Related DOI: https://doi.org/10.1142/S0217732305019122

Submission history

From: Edward W. Kolb [view email]
[v1] Mon, 25 Jul 2005 14:27:21 UTC (13 KB)
[v2] Fri, 29 Jul 2005 22:50:45 UTC (9 KB)
[v3] Sat, 10 Sep 2005 14:32:18 UTC (9 KB)
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