On the generation of density perturbations at the end of inflation

Details On the generation of density perturbations at the end of inflation On the generation of density perturbations at the end of inflation

2005-11-05

arxiv.org/abs/astro-ph/0511146v5

Phys.Rev.D72:123516,2005

Astronomy and Astrophysics

Astrophysics

7 pages, no figures. v2: significant revisions to section IV, other comments clarified, references added. v3: typo corrected,

Scientific paper

10.1103/PhysRevD.72.123516

Recently a mechanism was proposed whereby the primordial density perturbations are generated at the end of inflation. We continue the analysis of the proposed model of this mechanism and calculate the maximum extent to which the density perturbations produced via this model can dominate over those of the standard inflationary paradigm. In addition, we provide a straightforward variation of this model which allows for greater amplification of the density perturbations. Finally, we show that a variation in the implementation of the original model results in significant non-gaussianities in the resulting spectrum of density perturbations. The level of non-gaussianities can be made to saturate the current observational bound.

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