Inflation and Reheating in Induced Gravity

Details Inflation and Reheating in Induced Gravity Inflation and Reheating in Induced Gravity

2009-06-10

arxiv.org/abs/0906.1902v1

Phys. Lett. B 681: 383-386, 2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 2 figures

Scientific paper

10.1016/j.physletb.2009.10.066

Inflation is studied in the context of induced gravity (IG) $\gamma \sigma^2 R$, where $R$ is the Ricci scalar, $\sigma$ a scalar field and $\gamma$ a dimensionless constant. We study in detail cosmological perturbations in IG and examine both a Landau-Ginzburg (LG) and a Coleman-Weinberg (CW) potential toy models for small field and large field (chaotic) inflation and find that small field inflationary models in IG are constrained to $\gamma \lesssim 3 \times 10^{-3}$ by WMAP 5 yrs data. Finally we describe the regime of coherent oscillations in induced gravity by an analytic approximation, showing how the homogeneous inflaton can decay in its short-scale fluctuations when it oscillates around a non-zero value $\sigma_0$.

Affiliated with

Also associated with

No associations

Rating

Inflation and Reheating in Induced Gravity 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 Inflation and Reheating in Induced Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inflation and Reheating in Induced Gravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-206988