Cosmological magnetic fields from inflation and backreaction

Journal Article · Tue Dec 01 00:00:00 EST 2009 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2009/12/009· OSTI ID:22273118

Kanno, Sugumi ^[1]; Soda, Jiro; Watanabe, Masa-aki ^[2]

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1. Centre for Particle Theory, Department of Mathematical Sciences, Durham University, South Road, Durham, DH1 3LE (United Kingdom)
2. Department of Physics, Kyoto University, Kyoto, 606-8501 (Japan)

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.

• OSTI ID: 22273118
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 12; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
COSMOLOGY
ELECTROMAGNETIC FIELDS
INFLATIONARY UNIVERSE
MAGNETIC FIELDS