FLRW cosmology in Weyl type f (Q) gravity and observational constraints

GK Goswami, R Rani, JK Singh, A Pradhan - Journal of High Energy …, 2024 - Elsevier
Inspired by various works in a Weyl type f (Q) gravity to reduce some serious problems in
General Relativity Theory (GR), we develop a model of the universe in a Weyl type f (Q) …

The consequence of higher-order curvature-based constraints on f (R, Lm) gravity

JK Singh, A Singh, H Balhara, JRL Santos - Annals of Physics, 2024 - Elsevier
In this investigation, we perform an observational statistical analysis in the theory of f (R, L
m) gravity. The proposed theoretical model is based on the Ricci scalar's non-linear …

Bouncing Cosmology in f (R, G) f(R,G) Gravity with Thermodynamic Analysis

Shaily, JK Singh, A Singh - Fortschritte der Physik, 2024 - Wiley Online Library
The evolution of the universe in a modified gravity theory that includes the terms Ricci scalar
(RR) and the Gauss‐Bonnet invariant (GG) is studied. The function f (R, G) f(R,G) is obtained …

The constrained accelerating universe in f (R, T) gravity

JK Singh, H Balhara, P Singh - Astronomy and Computing, 2024 - Elsevier
In this paper, we study an alternative phenomenological model in f (R, T) gravity, where R
indicates Ricci scalar curvature and T is the trace of the stress–energy–momentum tensor …

Evolution of the Universe with quintessence model in Rastall gravity

JK Singh, A Singh, SG Ghosh, SD Maharaj - Physica Scripta, 2024 - iopscience.iop.org
We investigate the Universe's evolution within the framework of Rastall gravity, which is an
extension of the standard ΛCDM model. Utilizing a linear parametrization of the Equation of …

Constrained ΛCDM dark energy models in higher derivative f (R, Lm)-gravity theory

DC Maurya - Physics of the Dark Universe, 2023 - Elsevier
In the present paper, we have investigated dark energy scenarios in higher derivative f (R, L
m) gravity theory in a flat spacetime universe by constraining cosmographic series of Hubble …

Cosmic analysis of a model in higher-order gravity theory

JK Singh, H Balhara, K Bamba, J Jena - Astronomy and Computing, 2024 - Elsevier
The late-time cosmic acceleration is investigated in modified gravity theory with higher-order
curvature terms of the Ricci scalar and the Gauss–Bonnet invariant. The gravitational field …

Bianchi-I dark energy cosmological model in -gravity

DC Maurya - International Journal of Geometric Methods in Modern …, 2024 - World Scientific
We established an anisotropic Bianchi type-I dark energy model in this investigation'sf (R, L
m) gravity, where f (R, L m) is an arbitrary function of the Ricci-scalar curvature R and the …

Exact Cosmological Models in Modified Gravity with Observational Constraints

DC Maurya - Gravitation and Cosmology, 2023 - Springer
This study is an investigation of exact cosmological models in modified gravity with
observational constraints, where is the Ricci scalar, and is the matter Lagrangian for a …

gravity, and its cosmological implications

A Hazarika, S Arora, PK Sahoo, T Harko - arXiv preprint arXiv:2407.00989, 2024 - arxiv.org
In the present work, we extend the $ f (Q) $ symmetric teleparallel gravity by introducing an
arbitrary coupling between the non-metricity $ Q $ and matter Lagrangian $ L_m $ in the …