Evolution of Large Scale Curvature Fluctuations During the Perturbative Decay of the Inflaton
arXiv:0705.2185 · doi:10.1103/PhysRevD.76.043530
Abstract
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.
9 pages, 2 figures; v2: version published in PRD
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- Gravitational collapse in an expanding background and the role of substructure II: Excess power at small scales and its effect of collapse of structures at larger scales
- Covariant evolution of perturbations during reheating in two-field inflation
- Is a Dissipative Regime During Inflation in Agreement with Observations?