2020/04/30 by Yuri Shtanov, Mykhailo Pavliuk · 18 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Bound state #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Mechanism (biology) #Simple (philosophy) #Upper and lower bounds #astro-ph.CO #gr-qc #hep-ph
paper · pdf · doi:10.1088/1475-7516/2020/08/042
published in Journal of Cosmology and Astroparticle Physics 2020(08), 042 (Institute of Physics) · 18 pages, 2 figures, improved version to appear in JCAP, references added; corrected errors made in arXiv:1902.05894 and arXiv:1911.10424
openalex created_date 2020/04/10 · arxiv created 2020/08/10 · openalex publication_date 2020/08/24 · arxiv updated 2020/08/26 · openalex updated_date 2026/08/06
We derive a simple model-independent upper bound on the strength of magnetic fields obtained in inflationary and post-inflationary magnetogenesis taking into account the constraints imposed by the condition of weak coupling, back-reaction and Schwinger effect. This bound turns out to be rather low for cosmologically interesting spatial scales. Somewhat higher upper bound is obtained if one assumes that some unknown mechanism suppresses the Schwinger effect in the early universe. Incidentally, we correct our previous estimates for this case.