Electromagnetic Properties of the Early Universe

Abstract

Detailed physical processes of magnetic field generation from density fluctuations in the pre-recombination era are studied. Solving Maxwell equations and the generalized Ohm's law, the evolutions of the net charge density, the electric current and the electromagnetic field are solved. Unlike most of previous works, we treat electrons and photons as separate components under the assumption of tight coupling. We find that generation of the magnetic field due to density fluctuations takes place only from the second order of both perturbation theory and the tight coupling approximation.

14 pages, no figure, version accepted in Phys. Rev. D

References in corpus (8)

• Origin of Galactic and Extragalactic Magnetic Fields
• Cosmological Magnetic Field: a fossil of density perturbations in the early universe
• Magnetic field generation from cosmological perturbations
• Large-scale magnetic fields from density perturbations
• Generation of large scale magnetic fields at recombination epoch
• Generation of Magnetic Field in the Pre-recombination Era
• Cosmological magnetic fields from nonlinear effects
• Cosmological Structure Formation Creates Large-Scale Magnetic Fields

Cited by in corpus (14)

• The seed magnetic field generated during recombination
• Detectability of Pair Echos from Gamma-Ray Bursts and Intergalactic Magnetic Fields
• Primordial magnetic fields from second-order cosmological perturbations: Tight coupling approximation
• Probing Early Cosmic Magnetic Fields through Pair Echos from High-Redshift GRBs
• Impact of anisotropic stress of free-streaming particles on gravitational waves induced by cosmological density perturbations
• Intergalactic Magnetogenesis at Cosmic Dawn by Photoionization
• Late-time magnetogenesis driven by ALP dark matter and dark photon
• Magnetic field spectrum at cosmological recombination revisited
• Constraints on the Primordial Magnetic Field from ${\sigma }_8$
• Generation of large-scale magnetic fields, non-Gaussianity, and primordial gravitational waves in inflationary cosmology
• Chemical separation of primordial Li${}^{+}$ during structure formation caused by nanogauss magnetic field
• Evolution of magnetic fields through cosmological perturbation theory
• Cosmological Ohm's law and dynamics of non-minimal electromagnetism
• Primordial magnetogenesis before recombination