Bouncing cosmology in gravity

JK Singh, K Bamba, R Nagpal, SKJ Pacif - Physical Review D, 2018 - APS
A cosmological model with a specific form of the Hubble parameter is constructed in a flat
homogeneous, and isotropic background in the framework of f (R, T) gravity, where R is the …

Metric-affine Myrzakulov gravity theories

N Myrzakulov, R Myrzakulov, L Ravera - Symmetry, 2021 - mdpi.com
In this paper, we review the so-called Myrzakulov Gravity models (MG-N, with N= I, II,…, VIII)
and derive their respective metric-affine generalizations (MAMG-N), discussing also their …

Charged compact star in f(RT) gravity in Tolman–Kuchowicz spacetime

P Rej, P Bhar, M Govender - The European Physical Journal C, 2021 - Springer
In this current study, our main focus is on modeling the specific charged compact star SAX J
1808.4-3658 (M= 0.88 M_ ⊙ M⊙, R= 8.9 km) within the framework of f (R,\, T) f (R, T) …

Dynamics of a parametrized dark energy model in f (R, T) gravity

JK Singh, A Singh, GK Goswami, J Jena - Annals of Physics, 2022 - Elsevier
We investigate a flat FLRW-model in f (R, T)-gravity, which includes the quadratic variation in
scalar curvature R and the linear term of the trace of the stress–energy tensor T. In turn, we …

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 …

[PDF][PDF] Analysis with observational constraints in -cosmology in f(RT) gravity

R Nagpal, SKJ Pacif, JK Singh, K Bamba… - The European Physical …, 2018 - Springer
An exact cosmological solution of Einstein's field equations (EFEs) is derived for a
dynamical vacuum energy in f (R, T) gravity for Friedmann–Lemaitre–Robertson–Walker …

Variable Chaplygin gas cosmologies in f (R, T) gravity with particle creation

N Hulke, GP Singh, BK Bishi, A Singh - New Astronomy, 2020 - Elsevier
Abstract A flat FLRW (Friedmann–Lemaitre–Robertson–Walker) cosmological model with
perfect fluid comprising of variable Chaplygin gas (VCG) has been studied in the context of f …

Cosmological aspects of a hyperbolic solution in f (R, T) gravity

R Nagpal, JK Singh, A Beesham, H Shabani - Annals of Physics, 2019 - Elsevier
This article deals with a cosmological scenario in f (R, T) gravity for a flat FLRW model of the
universe. We consider the f (R, T) function as f (R)+ f (T) which starts with a quadratic …

FLRW cosmology with EDSFD parametrization

JK Singh, R Nagpal - The European Physical Journal C, 2020 - Springer
In this paper, we study a cosmological model in the background of Friedmann–Lemaitre–
Robertson–Walker (FLRW) space time by assuming an appropriate parametrization in the …

Dark energy nature in logarithmic cosmology

DC Maurya, J Singh, LK Gaur - International Journal of Geometric …, 2023 - World Scientific
This research paper is an investigation of dark energy nature of logarithmic f (R, T)-gravity
cosmology in a flat FLRW space–time universe. We have derived modified Einstein's field …