2019/02/28 by Yuri Shtanov · 19 citations
Physics and Astronomy · #Cosmological perturbation theory #Cosmology and Gravitation Theories #Coupling (piping) #Coupling strength #Electromagnetism #Function (biology) #Magnetic field #Order (exchange) #Pulsars and Gravitational Waves Research #Solar and Space Plasma Dynamics #Wavenumber #astro-ph.CO #gr-qc #hep-ph
paper · pdf · doi:10.1088/1475-7516/2019/10/008
published in Journal of Cosmology and Astroparticle Physics 2019(10), 008 (Institute of Physics) · 19 pages, new references added, notation slightly changed, matches the JCAP version
openalex created_date 2019/02/21 · arxiv created 2019/09/19 · openalex publication_date 2019/10/03 · arxiv updated 2019/10/09 · openalex updated_date 2026/08/05
We consider helical coupling to electromagnetism and present a simple scenario of evolution of the coupling function leading to a viable inflationary magnetogenesis without the problem of back-reaction. In this scenario, helical magnetic fields of strength of order up to 10 − 7 G, when extrapolated to the current epoch, can be generated in a narrow spectral band centered at any reasonable wavenumber by adjusting the model parameters. We discuss implications of this model for baryogenesis, which impose additional constraints on the strength and correlation length of magnetic field.