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Generation of density perturbations at the end of inflation

Salem, Michael P. (2005) Generation of density perturbations at the end of inflation. Physical Review D, 72 (12). Art. No. 123516. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:SALprd05

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Abstract

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.


Item Type:Article
Additional Information:©2005 The American Physical Society (Received 16 November 2005; published 22 December 2005) M. S. thanks Michael Graesser and Mark Wise for helpful discussions and thanks Michael Graesser for useful comments upon his review of the manuscript. M. S. also thanks David Lyth for correcting an assumption made in an earlier report of this work and for other helpful comments. This work was supported by the U.S. Department of Energy under Contract No. DE-FG03-92ER40701.
Subject Keywords:cosmology; gravitation; radiofrequency cosmic radiation
Record Number:CaltechAUTHORS:SALprd05
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SALprd05
Alternative URL:http://dx.doi.org/10.1103/PhysRevD.72.123516
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1975
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:28 Feb 2006
Last Modified:26 Dec 2012 08:46

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