Scale-invariant helical magnetic fields from inflation

Tomohiro Fujita, Ruth Durrer

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


We discuss a model which can generate scale-invariant helical magnetic fields on large scales (≤ 1Mpc) in the primordial universe. It is also shown that the electric conductivity becomes significant and terminates magnetogenesis even before reheating is completed. By solving the electromagnetic dynamics taking conductivity into account, we find that magnetic fields with amplitude B∼ 10-15G at present can be generated without encountering a backreaction or strong coupling problem.

Original languageEnglish
Article number008
JournalJournal of Cosmology and Astroparticle Physics
Issue number9
Publication statusPublished - 2019 Sept 3
Externally publishedYes


  • extragalactic magnetic fields
  • ination
  • primordial magnetic fields

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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