Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-10-21
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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