Acceleration of Universe by Nonlinear Electromagnetic Fields

TL;DR

This paper proposes a nonlinear electromagnetic field model as the source of cosmic acceleration, aligning with observational data and demonstrating stability and causality.

Contribution

It introduces a new nonlinear electromagnetic field model with a dimensional parameter that explains universe acceleration and matches key cosmological observations.

Findings

The model explains accelerated expansion via nonlinear electromagnetic fields.

It shows causality and classical stability during deceleration.

Spectral index and tensor-to-scalar ratio align with observational data.

Abstract

A new model of nonlinear electromagnetic fields possessing a dimensional parameter $\beta$ is proposed. Electromagnetic fields are considered as the source of the gravitation field and accelerated expansion of the universe is driven by nonlinear electromagnetic fields. We consider the magnetic universe and the stochastic magnetic field is a source of the universe acceleration. After the universe inflation and the accelerated expansion the universe decelerates. We show the causality of the model and a classical stability at the deceleration phase. The spectral index, the tensor-to-scalar ratio, and the running of the spectral index were estimated that approximately fulfil the PLANK, WMAP, and BICEP2 data.