Cosmological magnetic fields from inflation and backreaction

Sugumi Kanno, Jiro Soda, Masa Aki Watanabe

Research output: Contribution to journalArticlepeer-review

158 Citations (Scopus)


We study the backreaction problem in a mechanism of magnetogenesis from inflation. In usual analysis, it has been assumed that the backreaction due to electromagnetic fields spoils inflation once it becomes important. However, there exists no justification for this assumption. Hence, we analyze magnetogenesis from inflation by taking into account the backreaction. On the contrary to the naive expectation, we show that inflation still continues even after the backreaction begins to work. Nevertheless, it turns out that creation of primordial magnetic fields is significantly suppressed due to the backreaction.

Original languageEnglish
Article number009
JournalJournal of Cosmology and Astroparticle Physics
Issue number12
Publication statusPublished - 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics


Dive into the research topics of 'Cosmological magnetic fields from inflation and backreaction'. Together they form a unique fingerprint.

Cite this