Three-magnetic fields

TL;DR

This paper introduces a novel mechanism within three-form inflation to generate large-scale cosmological magnetic fields, leveraging fourth order vector perturbation dynamics to avoid backreaction issues present in earlier models.

Contribution

It presents a new theoretical mechanism for magnetic field generation during inflation using three-form fields, avoiding backreaction problems.

Findings

Proposes a new generation mechanism for cosmological magnetic fields.

Utilizes fourth order vector perturbation dynamics.

Avoids backreaction issues common in previous models.

Abstract

A completely new mechanism to generate the observed amount of large-scale cosmological magnetic fields is introduced in the context of three-form inflation. The amplification of the fields occurs via fourth order dynamics of the vector perturbations and avoids the backreaction problem that plagues most previously introduced mechanisms.