Curvaton with nonminimal derivative coupling to gravity
High Energy Physics - Theory
2015-06-16 v2 General Relativity and Quantum Cosmology
Abstract
We show a curvaton model, in which the curvaton has a nonminimal derivative coupling to gravity. Thanks to such a coupling, we find that the scale-invariance of the perturbations can be achieved for arbitrary values of the equation-of-state of background, provided that it is nearly a constant. We also discussed about tensor perturbations, the local non-Gaussianities generated by the nonminimal derivative coupling curvaton model, as well as the adiabatic perturbations which are transferred from the field perturbations during the curvaton decay.
Cite
@article{arxiv.1307.7864,
title = {Curvaton with nonminimal derivative coupling to gravity},
author = {Kaixi Feng and Taotao Qiu and Yun-Song Piao},
journal= {arXiv preprint arXiv:1307.7864},
year = {2015}
}
Comments
11 pages