Dynamo efficiency in large scale magnetic fields in parity violation torsion theories

TL;DR

This paper investigates magnetic field amplification in theories with torsion, showing that the dynamo effect can produce weaker magnetic fields than previously thought, with implications for cosmological magnetic field origins.

Contribution

It derives a modified dynamo equation in torsion theories, demonstrating a lower magnetic field strength than earlier models in teleparallel gravity.

Findings

Dynamo-generated magnetic fields are weaker ($10^{-11}G$) compared to previous estimates ($10^{-9}G$).

The study extends dynamo theory to include spacetime torsion effects.

Results suggest torsion theories impact cosmic magnetic field evolution.

Abstract

Earlier a nondynamo theory in teleparallel gravity was developed by Bamba et al-JCAP 2010. Also earlier I have been obtained a dynamo equation generalised to spacetime with torsion - PLB 2012. In this paper we obtained from this equation $10^{-11}G$ instead $10^{-9}G$ obtained by Bamba et al.