Cosmology from non-minimal geometry-matter coupling
General Relativity and Quantum Cosmology
2024-03-21 v2
Abstract
We construct a cosmological model from the inception of the Friedmann-Lem\^aitre-Robertson-Walker metric into the field equations of the f(R,L_m) gravity theory, with R being the Ricci scalar and L_m being the matter lagrangian density. The formalism is developed for a particular f(R,L_m) function, namely R/16\pi +(1+\sigma R)L_{m}, with \sigma being a constant that carries the geometry-matter coupling. Our solutions are remarkably capable of evading the Big-Bang singularity as well as predict the cosmic acceleration with no need for the cosmological constant, but simply as a consequence of the geometry-matter coupling terms in the Friedmann-like equations
Cite
@article{arxiv.2101.05918,
title = {Cosmology from non-minimal geometry-matter coupling},
author = {B. S. Gonçalves and P. H. R. S. Moraes and B. Mishra},
journal= {arXiv preprint arXiv:2101.05918},
year = {2024}
}
Comments
5 pages, 3 figures, Accepted version Fortschritte der physik