Cosmological evolution in R^2 gravity
General Relativity and Quantum Cosmology
2015-06-03 v4 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
The Universe evolution during the radiation-dominated epoch in the R^2-extended gravity theory is considered. The equations of motion for R and H are solved analytically and numerically. The particle production rate by the oscillating curvature is calculated in one-loop approximation and the back reaction of particle production on the evolution of R is taken into account. Possible implications of the model for cosmological creation of non-thermal dark matter is discussed.
Cite
@article{arxiv.1112.4995,
title = {Cosmological evolution in R^2 gravity},
author = {E. V. Arbuzova and A. D. Dolgov and L. Reverberi},
journal= {arXiv preprint arXiv:1112.4995},
year = {2015}
}
Comments
22 pages, 7 figures. Several references and criticism added. As published in JCAP