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) …

Comprehensive study of bouncing cosmological models in f(QT) theory

MZ Gul, M Sharif, S Shabbir - The European Physical Journal C, 2024 - Springer
The main objective of this article is to investigate the viability of bouncing cosmological
scenarios using different forms of scale factors with perfect matter configuration in the …

A non-singular bouncing cosmology in f (R, T) gravity

JK Singh, A Singh, A Beesham, H Shabani - Annals of Physics, 2023 - Elsevier
We investigate a bounce realization in the framework of higher order curvature in f (R, T)
modified theory of gravity. We perform a detailed analysis of the cosmological parameters to …

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 …

A comprehensive study of cosmic dynamics in f (Q) theory

M Sharif, MZ Gul, N Fatima - Chinese Journal of Physics, 2024 - Elsevier
In this paper, we explore modified f (Q) gravity models in the context of a Bianchi type-I
spacetime, where Q defines non-metricity. We derive the field equations to account for …

Modeling cosmic acceleration with a generalized varying deceleration parameter

M Koussour, N Myrzakulov, AHA Alfedeel… - Physics of the Dark …, 2023 - Elsevier
Understanding the accelerating expansion of the Universe remains a fundamental
challenge in modern cosmology. In this paper, we investigate a cosmological model …

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 …

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 …