English

Constant-roll inflation driven by a scalar field with non-minimal derivative coupling

General Relativity and Quantum Cosmology 2019-10-23 v1 High Energy Physics - Theory

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, η\eta, which quantifies the non-minimal derivative coupling and a parameter α\alpha 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 "cosh\cosh-type" potential, are attractors.

Keywords

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

R2 v1 2026-06-23T10:29:56.523Z