Isocurvature Perturbations in Multiple Inflationary Models

Details Isocurvature Perturbations in Multiple Inflationary Models Isocurvature Perturbations in Multiple Inflationary Models

1994-04-24

arxiv.org/abs/astro-ph/9404061v1

Phys.Rev.D50:6123-6129,1994

Astronomy and Astrophysics

Astrophysics

Latex, 16 pages, YITP-U-94-008

Scientific paper

10.1103/PhysRevD.50.6123

Dynamics of long-wave isocurvature perturbations during an inflationary stage in multiple (multi-component) inflationary models is calculated analytically for the case where scalar fields producing this stage interact between themselves through gravity only. This enables to determine correct amplitudes of such perturbations produced by vacuum quantum fluctuations of the scalar fields during the multiple inflationary stage. Exact matching to a post-inflationary evolution that gives the amplitude of isocurvature perturbations in the cold dark matter model with radiation is performed in the case where a massive inflaton field remains uncoupled from usual matter up to the present time. For this model, isocurvature perturbations are smaller than adiabatic ones in the region of the break in the perturbation spectrum which arises due to a transition between the two phases of inflation, but they may be much bigger and have a maximum at much shorter scales. The case of an inflaton with a quartic coupling which remains uncoupled after inflation is considered, too.

Affiliated with

Also associated with

No associations

Rating

Isocurvature Perturbations in Multiple Inflationary Models 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 Isocurvature Perturbations in Multiple Inflationary Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isocurvature Perturbations in Multiple Inflationary Models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-4383