Generation of Cosmic Magnetic Fields and Gravitational Waves at Neutrino Decoupling

Abstract

We show that an inhomogeneous cosmological lepton number may have produced turbulence in the primordial plasma when neutrinos entered (almost) free-streaming regime. This effect may be responsible for the origin of cosmic magnetic fields and give rise to a detectable background of gravitational waves. An existence of inhomogeneous lepton asymmetry could be naturally generated by active-sterile neutrino oscillations or by some versions of Affleck and Dine baryogenesis scenario.

arXiv comment5 Pages, RevTeX - 2 encapsulated postscript figures; final version accepted for pubblication in PRL

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• Magnetogenesis from axion inflation
• Relic Backgrounds of Gravitational Waves from Cosmic Turbulence
• Evolution of Primordial Magnetic Fields from Phase Transitions
• Gravitational Radiation Generated by Cosmological Phase Transition Magnetic Fields
• Inflation-Produced Magnetic Fields in Nonlinear Electrodynamics
• CMB anisotropies due to cosmological magnetosonic waves
• Generation of large scale magnetic fields at recombination epoch
• Cosmological magnetic fields from nonlinear effects
• Large-scale magnetic field generation by alpha-effect driven by collective neutrino-plasma interaction
• Magnetic helicity and cosmological magnetic field
• Primordial magnetic fields and gravitational baryogenesis in nonlinear electrodynamics
• Cosmological Implications of Neutrinos
• Addendum to: Update on neutrino mixing in the early Universe
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• The evolution of primordial magnetic field since its generation
• Statistical Properties of Scale-Invariant Helical Magnetic Fields and Applications to Cosmology
• Evolution of primordial magnetic fields in mean-field approximation
• On the frequency of gravitational waves
• CMB spectral distortions from the decay of causally generated magnetic fields
• Isotherms clustering in cosmic microwave background
• Screening corrections to Electron Capture Rates and resulting constraints on Primordial Magnetic Fields
• Gravitational waves in neutrino plasma and NANOGrav signal
• Nonlinear electrodynamics and CMB polarization
• Magnetogenesis from axion-SU(2) inflation
• Neutrino-electron magnetohydrodynamics in an expanding Universe
• Magnetic fields in a hot dense neutrino plasma and the Gravitational Waves
• Multiscaling Anderson localization of cosmic electromagnetic fields
• Effect of Magnetic Field Dissipation on Primordial Li Abundance
• Neutrino induced vorticity, Alfven waves and the normal modes
• Distribution function of nuclei from $e^{\pm }$ scattering in the presence of a strong primordial magnetic field
• Gradient measure and extended self-similarity of the cosmic microwave background anisotropy
• The cosmological information on neutrino mixing
• Scaling properties of the cosmic background plasma and radiation