Emergent Cosmology in Models of Nonlinear Electrodynamics

TL;DR

This paper investigates how nonlinear electrodynamics can lead to emergent cosmology, avoiding the Big Bang singularity, and analyzes the inflationary parameters resulting from such models.

Contribution

It introduces a model of emergent cosmology based on nonlinear electrodynamics and explores how the parameter β influences the transition from a static to an inflationary universe.

Findings

Spectral index n_s = 0.97467

Tensor-to-scalar ratio r = 0.10133

Tensor spectral index n_T = -0.01267

Abstract

Nonlinear electrodynamics, which acts as a source of gravity Einstein field equations, leads to emergent cosmology, an alternative solution which can avoid Big Bang singularity. In this paper, we explore the emerging universe in models of non-linear electrodynamics (described by dimensional parameter $\beta$) by using the equation of state parameter $\omega$ and see how the parameter $\beta$ helps the universe to cause a transition from a quasi-static Minkowski phase to the inflationary phase of expansion through the point of emergence and subsequently to the phase of normal thermal expansion. We predict the spectral index parameter $n_s = 0.97467$ (scalar spectral index), $r =0.10133$ (tensor to scalar ratio) and $n_T = -0.01267$ (tensor spectral index) of the inflationary perturbation in emergent cosmology of nonlinear electrodynamics corresponding to $\beta$ = 0.1 and $B_0=10^{-10}$G.