Cosmological singularities in $f(T,\phi)$ gravity
Abstract
The pursuit of understanding the mysteries surrounding dark energy has sparked significant interest within the field of cosmology. While conventional approaches, such as the cosmological constant, have been extensively explored, alternative theories incorporating scalar field-based models and modified gravity have emerged as intriguing avenues. Among these, teleparallel theories of gravity, specifically the formulation, have gained prominence as a means to comprehend dark energy within the framework of teleparallelism. In this study, we investigate two well-studied models of teleparallel dark energy and examine the presence of cosmological singularities within these scenarios. Using the Goriely-Hyde procedure, we examine the dynamical systems governing the cosmological equations of these models. Our analysis reveals that both models exhibit Type IV singularities, but only for a limited range of initial conditions. These results could indicate a potential edge for teleparallel cosmological models over their other modified gravity counterparts, as the models we examine seem to be only allowing for weak singularities that too under non general conditions.
Cite
@article{arxiv.2310.20222,
title = {Cosmological singularities in $f(T,\phi)$ gravity},
author = {Oem Trivedi and Maxim Khlopov and Jackson Levi Said and Rafael C. Nunes},
journal= {arXiv preprint arXiv:2310.20222},
year = {2024}
}
Comments
v2, mateches the published version in EPJC, 15 pages with no figures. arXiv admin note: text overlap with arXiv:2310.00452