Healthy Horndeski cosmologies with torsion
General Relativity and Quantum Cosmology
2024-07-22 v2 High Energy Physics - Theory
Abstract
We show that the full Horndeski theory with both curvature and torsion can support nonsingular, stable and subluminal cosmological solutions at all times. Thus, with torsion, the usual No-Go theorem that holds in a curved spacetime is avoided. In particular, it is essential to include the nonminimal derivative couplings of the part of the Horndeski action ( and ). Without the latter a No-Go already impedes the eternal subluminality of nonsingular, stable cosmologies.
Keywords
Cite
@article{arxiv.2405.08673,
title = {Healthy Horndeski cosmologies with torsion},
author = {S. Mironov and M. Valencia-Villegas},
journal= {arXiv preprint arXiv:2405.08673},
year = {2024}
}
Comments
21 pages, 13 Figures. Version accepted for publication in JCAP. Results unchanged. Added references