Matter-antimatter asymmetry induced by non-linear electrodynamics

TL;DR

This paper introduces a non-linear electrodynamics model that addresses early universe singularities, accelerates cosmic expansion, and explains matter-antimatter asymmetry through a novel parameter-driven mechanism.

Contribution

It presents a new cosmological model based on non-linear electrodynamics that unifies early universe acceleration, singularity avoidance, and baryon asymmetry generation.

Findings

Early universe undergoes acceleration to a radiation era

Singularities in energy density, pressure, and curvature are avoided

Baryon asymmetry is successfully generated via the model's parameters

Abstract

In this work, we propose an economical model to address some open cosmological problems such as the absence of the initial cosmological singularity, an early acceleration of the Universe and the generation of matter-antimatter asymmetry. The model is based on a scenario in which the early Universe consists of a non-linear electrodynamics fields. It is found that the non-linear electrodynamics model has an equation of state $p=\frac{1}{3} \rho - \frac{4}{3} \beta \rho^{1+\alpha}$ which shows that the Universe undergoes an early epoch acceleration to a radiation era given by $p =\frac{1}{3} \rho$. We show that the singularities in the energy density, pressure and curvature are absent at early stages. In our scenario, the baryon asymmetry is generated by the non-linearity parameter $\beta$. Additionally, we calculate the resulting baryon asymmetry and discuss how a successful gravitational baryogenesis is obtained for different values of the model's parameter space.