Generating the curvature perturbation with instant preheating

Details Generating the curvature perturbation with instant preheating Generating the curvature perturbation with instant preheating

2006-10-21

arxiv.org/abs/hep-th/0610232v5

JCAP 0703:003,2007

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 1 figure, To appear in JCAP

Scientific paper

10.1088/1475-7516/2007/03/003

A new mechanism for generating the curvature perturbation at the end of inflaton has been investigated. The dominant contribution to the primordial curvature perturbation may be generated during the period of instant preheating. The mechanism converts isocurvature perturbation related to a light field into curvature perturbation, where the ``light field'' is not the inflaton field. This mechanism is important in inflationary models where kinetic energy is significant at the end of inflaton. We show how one can apply this mechanism to various brane inflationary models.

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