Inflation in pure gravity with only massless spin-2 fields
General Relativity and Quantum Cosmology
2016-03-03 v2 High Energy Physics - Theory
Abstract
We show that without introducing additional fields or extra degrees of freedom, a specific higher derivative extension of Einstein's gravity that has only a massless spin-2 excitation in its perturbative spectrum, has an inflationary period, a quasi-de Sitter phase with enough number of e-foldings required to solve the horizon and related problems. The crucial ingredient in the construction is the curvature dependence of the effective Newton's constant.
Cite
@article{arxiv.1602.08949,
title = {Inflation in pure gravity with only massless spin-2 fields},
author = {Bayram Tekin},
journal= {arXiv preprint arXiv:1602.08949},
year = {2016}
}
Comments
5 pages,1 figure, reference added, typos corrected