Evolution of Large Scale Curvature Fluctuations During the Perturbative Decay of the Inflaton

Details Evolution of Large Scale Curvature Fluctuations During the Perturbative Decay of the Inflaton Evolution of Large Scale Curvature Fluctuations During the Perturbative Decay of the Inflaton

2007-05-15

arxiv.org/abs/0705.2185v2

Phys.Rev.D76:043530,2007

Astronomy and Astrophysics

Astrophysics

9 pages, 2 figures; v2: version published in PRD

Scientific paper

10.1103/PhysRevD.76.043530

We study the evolution of cosmological fluctuations during and after inflation driven by a scalar field coupled to a perfect fluid through afriction term. During the slow-roll regime for the scalar field, the perfect fluid is also frozen and isocurvature perturbations are generated. After the end of inflation, during the decay of the inflaton, we find that a change in the observationally relevant large scale curvature fluctuations is possible.

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