Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-09-05
Class.Quant.Grav. 17 (2000) 4467-4480
Astronomy and Astrophysics
Astrophysics
22 pages, 3 figures, use RevTex, accepted by Class. Quant. Grav
Scientific paper
10.1088/0264-9381/17/21/308
We investigated the evolution of the primordial density perturbations produced by inflation with thermal dissipation. A full relativistic analysis on the evolution of initial perturbations from the warm inflation era to a radiation-dominated universe has been developed. The emphasis is on tracking the ratio between the adiabatic and the isocurvature mode of the initial perturbations. This result is employed to calculate a testable factor: the super-Hubble suppression of the power spectrum of the primordial perturbations. We show that based on the warm inflation scenario, the super-Hubble suppression factor, $s$, for an inflation with thermal dissipation is at least 0.5. This prediction does not depend on the details of the model parameters. If $s$ is larger than 0.5, it implies that the friction parameter $\Gamma$ is larger than the Hubble expansion parameter $H$ during the inflation era.
Fang L.-Z.
Lee Lik Wee
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