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) …

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 …

Reconstruction of an observationally constrained gravity model

A Pradhan, G Goswami, A Beesham - International Journal of …, 2023 - World Scientific
In this paper, an attempt is made to construct a Friedmann–Lemaitre–Robertson–Walker
model in f (R, T) gravity with a perfect fluid that yields acceleration at late times. We take f (R …

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 …

The cosmological model in f (R, Tϕ) gravity with Scalar Field conformity

JK Singh, A Singh, J Jena - Chinese Journal of Physics, 2023 - Elsevier
The homogeneous and isotropic cosmological model in generalized f (R, T ϕ) theories
associated with the scalar field is discussed, which is motivated by the f (R, T) theory of …

Power law cosmology in Gauss-Bonnet gravity with pragmatic analysis

R Rani, GK Goswami, JK Singh - Journal of High Energy Astrophysics, 2025 - Elsevier
In this study, we present an approach f (R, G) gravity incorporating power law in G. To study
the cosmic evolution of the universe given by the reconstruction of the Hubble parameter …

On a Model of Variable Curvature that Mimics the Observed Universe Acceleration

MA García Aspeitia, A Esteban-Gutiérrez… - Available at SSRN … - papers.ssrn.com
We present a new model based on GR in where a subtle change of curvature is able to
produce the observed Universe acceleration and an oscillating behavior in the effective …