Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2009/12/009
Keywords
primordial magnetic fields; inflation
Funding
- Ministry of Education, Science and Culture of Japan [18540262]
- Global COE Program
- STFC [ST/G000433/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G000433/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [18540262] Funding Source: KAKEN
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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.
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