Constant-roll inflation driven by a scalar field with non-minimal derivative coupling
Abstract
In this work, we study constant-roll inflation driven by a scalar field with non-minimal derivative coupling to gravity, via the Einstein tensor. This model contains a free parameter, , which quantifies the non-minimal derivative coupling and a parameter which characterize the constant-roll condition. In this scenario, using the Hamilton-Jacobi-like formalism, an ansatz for the Hubble parameter (as a function of the scalar field) and some restrictions on the model parameters, we found new exact solutions for the inflaton potential which include power-law, de Sitter, quadratic hilltop and natural inflation, among others. Additionally, a phase space analysis was performed and it is shown that the exact solutions associated to natural inflation and a "-type" potential, are attractors.
Cite
@article{arxiv.1907.10694,
title = {Constant-roll inflation driven by a scalar field with non-minimal derivative coupling},
author = {A. Oliveros and Hernán E. Noriega},
journal= {arXiv preprint arXiv:1907.10694},
year = {2019}
}
Comments
15 pages, 6 figures, accepted for publication in Int. J. Mod. Phys. D