Cosmological magnetic fields in turbulent matter
arXiv:1711.05982 · doi:10.1088/1742-6596/934/1/012042
Abstract
We study the evolution of magnetic fields in turbulent hot plasma of the early Universe accounting for the chiral magnetic effect. The magnetohydrodynamic turbulence is modeled by replacing the matter velocity in the advection term in the Faraday equation with the Lorentz force. The system of the kinetic equations for the spectra of the densities of the magnetic helicity and the magnetic energy, as well as for the chiral imbalance, is derived. The amplification of the magnetic field is shown to result from the presence of the chiral magnetic effect solely. The system of the kinetic equations is solved numerically in primordial plasma after the electroweak phase transition. The influence of the matter turbulence on the magnetic field evolution is examined for different seed magnetic fields.
arXiv comment5 pages in LaTeX2e, 6 eps figures; J. Phys. Conf. Ser. LaTeX style; Contribution to the proceedings of the 3rd International Conference on Particle Physics and Astrophysics (October 2-5, 2017; Moscow, Russia)
References in corpus (7)
- Cosmological Magnetic Fields: Their Generation, Evolution and Observation
- Self-consistent evolution of magnetic fields and chiral asymmetry in the early Universe
- Speculations on Primordial Magnetic Helicity
- Evolution of Magnetic Fields in Freely Decaying Magnetohydrodynamic Turbulence
- Constraints on the Strength of a Primordial Magnetic Field from Big Bang Nucleosynthesis
- Lepton asymmetry growth in the symmetric phase of an electroweak plasma with hypermagnetic fields versus its washing out by sphalerons
- Influence of the turbulent motion on the chiral magnetic effect in the early Universe