Generation of helical magnetic fields from inflation

Abstract

The generation of helical magnetic fields during single field inflation due to an axial coupling of the electromagnetic field to the inflaton is discussed. We find that such a coupling always leads to a blue spectrum of magnetic fields during slow roll inflation. Though the helical magnetic fields further evolve during the inverse cascade in the radiation era after inflation, we conclude that the magnetic fields generated by such an axial coupling can not lead to observed field strength on cosmologically relevant scales.

4 pages, 1 figure; Contribution to the proceedings of the International Conference on Gravitation and Cosmology (ICGC), Goa, India, December, 2011

References in corpus (11)

• Astrophysical magnetic fields and nonlinear dynamo theory
• Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars
• Generation of Large-Scale Magnetic Fields in Single-Field Inflation
• N-flationary magnetic fields
• Magnetic fields in the early universe
• Can slow roll inflation induce relevant helical magnetic fields?
• VLA radio continuum observations of a new sample of high redshift radio galaxies
• Evolution of Magnetic Fields in Freely Decaying Magnetohydrodynamic Turbulence
• Exploring the magnetized cosmic web through low frequency radio emission
• Resonant magnetic fields from inflation
• Searching For Integrated Sachs-Wolfe Effect Beyond Temperature Anisotropies: CMB E-mode Polarization-Galaxy Cross Correlation

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