Numerical simulations of the decay of primordial magnetic turbulence

TL;DR

This paper uses numerical simulations to study how primordial magnetic fields evolve during early Universe phase transitions, revealing that magnetic configurations depend on initial conditions.

Contribution

It introduces a simulation-based model for magnetic field evolution during cosmological phase transitions, highlighting the dependence on initial conditions.

Findings

Magnetic field configurations depend on initial conditions.

Velocity fields are nearly independent of initial conditions.

Simulations model magnetic field evolution in early Universe scenarios.

Abstract

We perform direct numerical simulations of forced and freely decaying 3D magnetohydrodynamic turbulence in order to model magnetic field evolution during cosmological phase transitions in the early Universe. Our approach assumes the existence of a magnetic field generated either by a process during inflation or shortly thereafter, or by bubble collisions during a phase transition. We show that the final configuration of the magnetic field depends on the initial conditions, while the velocity field is nearly independent of initial conditions.