Integrable modified gravity cosmological models with an additional scalar field
General Relativity and Quantum Cosmology
2021-11-11 v2 Cosmology and Nongalactic Astrophysics
Mathematical Physics
math.MP
Abstract
We consider modified gravity cosmological models that can be transformed into two-field chiral cosmological models by the conformal metric transformation. For the gravity model with an additional scalar field and the corresponding two-field model with the cosmological constant and nonstandard kinetic part of the action, the general solutions have been obtained in the spatially flat FLRW metric. We analyze the correspondence of the cosmic time solutions obtained and different possible evolutions of the Hubble parameters in the Einstein and Jordan frames.
Keywords
Cite
@article{arxiv.2108.10276,
title = {Integrable modified gravity cosmological models with an additional scalar field},
author = {Vsevolod R. Ivanov and Sergey Yu. Vernov},
journal= {arXiv preprint arXiv:2108.10276},
year = {2021}
}
Comments
11 pages, 3 figures, v2: minor corrections, references are added, to appear in EPJC