Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2001-03-24
Phys.Rev. D64 (2001) 063513
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
12 pages, no figures, requires revtex4. Further explanation on the origin of the entropy perturbation, reference added and min
Scientific paper
10.1103/PhysRevD.64.063513
Warm inflation is an interesting possibility of describing the early universe, whose basic feature is the absence, at least in principle, of a preheating or reheating phase. Here we analyze the dynamics of warm inflation generalizing the usual slow-roll parameters that are useful for characterizing the inflationary phase. We study the evolution of entropy and adiabatic perturbations, where the main result is that for a very small amount of dissipation the entropy perturbations can be neglected and the purely adiabatic perturbations will be responsible for the primordial spectrum of inhomogeneities. Taking into account the COBE-DMR data of the cosmic microwave background anisotropy as well as the fact that the interval of inflation for which the scales of astrophysical interest cross outside the Hubble radius is about 50 e-folds before the end of inflation, we could estimate the magnitude of the dissipation term. It was also possible to show that at the end of inflation the universe is hot enough to provide a smooth transition to the radiation era.
de Oliveira Henrique P.
Joras Sergio E.
No associations
LandOfFree
On Perturbations in Warm Inflation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On Perturbations in Warm Inflation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On Perturbations in Warm Inflation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-294284