Cosmology with variable $G$ and nonlinear electrodynamics

Abstract

In a bid to resolve lingering problems in cosmology, more focus is being tilted towards cosmological models in which physical constants of nature are not necessarily real constants but vary with cosmic time. In this paper, we study a cosmological model in nonlinear electrodynamics with Newton's gravitational constant $G$, which is not a constant but varies in terms of a power law of the scale factor of the universe. Hence, the evolution of the scale factor $a(t)$ is studied in this model, which depends on a fine-tuning term of nonlinear electrodynamics, $\alpha$. Finally, we verify the stability of the model using the speed of sound.

6 pages, Accepted for publication in Indian Journal of Physics

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Cited by in corpus (3)

• Testing a varying-$\Lambda$ model for dark energy within Co-varying Physical Couplings framework
• Non-linear Electrodynamics in Blandford-Znajeck Energy Extraction
• Exploring the Evolution of Nonlinear Electrodynamics in the Universe: A Dynamical Systems Approach