Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Alfedeel, A. H. A."'
Autor:
Sahlu, Shambel, Shukla, Bhupendra Kumar, Tiwari, Rishi Kumar, Sofuoğlu, Değer, Alfedeel, Alnadhief H. A.
In this paper, we have studied the late-time accelerating expansion of the Universe using the matter-geometry coupled $ f(Q, T) $ gravity model, where $ Q $ is the non-metricity scalar and $ T $ represents the trace of the energy-momentum tensor. We
Externí odkaz:
http://arxiv.org/abs/2411.04757
This paper delves into the late-time accelerated expansion of the universe and the evolution of cosmic structures within the context of a specific \( f(R, L_m) \) gravity model, formulated as \( f(R, L_m) = \lambda R + \beta L_m^\alpha + \eta \). To
Externí odkaz:
http://arxiv.org/abs/2406.08303
In this work, we investigate the bouncing behavior of the universe within the framework of $f(R,L_m)$ gravity, using a simple form of $f(R,L_m)=\frac{R}{2}+L_m^\gamma$ (where $\gamma$ is a free model parameter) as previously studied. The model predic
Externí odkaz:
http://arxiv.org/abs/2403.15772
Publikováno v:
Astron. Comput. 47, 100821 (2024)
In this paper, we investigate the cosmological implications and constraints of Weyl-type $f(Q, T)$ gravity. This theory introduces a coupling between the non-metricity $Q$ and the trace $T$ of the energy-momentum tensor, using the principles of prope
Externí odkaz:
http://arxiv.org/abs/2403.09916
Publikováno v:
Eur. Phys. J. Plus 138, 1030 (2023)
We propose a novel approach to parameterize the equation of state for Scalar Field Dark Energy (SFDE) and use it to derive analytical solutions for various cosmological parameters. Using statistical MCMC with Bayesian techniques, we obtain constraint
Externí odkaz:
http://arxiv.org/abs/2311.03299
In this paper, we investigate the evolution of cosmological perturbations within the context of Bianchi Type$-I$ spacetimes. We consider models containing viscous fluids with evolving cosmological (\LL) and Newtonian gravitational (G) parameters. The
Externí odkaz:
http://arxiv.org/abs/2311.03399
Autor:
Koussour, M., Myrzakulov, N., Alfedeel, Alnadhief H. A., Hassan, E. I., Sofuoğlu, D., Mirgani, Safa M.
This paper is a parametrization of the equation of state (EoS) parameter of dark energy (DE), which is parameterized using Square-Root (SR) form i.e. $\omega _{SR}=\text{$\omega _{0}$}+\text{$\omega _{1}$}\frac{z}{\sqrt{z^{2}+1}}$, where $\omega _{0}
Externí odkaz:
http://arxiv.org/abs/2310.20405
Publikováno v:
Prog. Theor. Exp. Phys. 2023, 113E01 (2023)
Despite the significant accomplishments of general relativity, numerous unresolved issues persist in our understanding of the cosmos. One of the most perplexing challenges is the ongoing accelerated expansion of the Universe, which continues to elude
Externí odkaz:
http://arxiv.org/abs/2310.15067
Publikováno v:
Chin. J. Phys. 86, 300-312 (2023)
This study delves into modified gravity theories that are equivalent to General Relativity but involve the torsion or non-metricity scalar instead of the curvature scalar. Specifically, we focus on $f(Q,T)$ gravity, which entails an arbitrary functio
Externí odkaz:
http://arxiv.org/abs/2310.00805
Publikováno v:
Phys. Dark Universe 101339 (2023)
Understanding the accelerating expansion of the Universe remains a fundamental challenge in modern cosmology. In this paper, we investigate a cosmological model parametrized by a generalized variable deceleration parameter to elucidate the dynamics d
Externí odkaz:
http://arxiv.org/abs/2309.14498