Inationary dilaton-axion magnetogenesis

Kin Wang Ng, Shu Lin Cheng, Wo-Lung Lee

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Abstract

We discuss the generation of primordial magnetic fields during in ation in dilaton-axion electromagnetism, in which the dilaton and axion dynamics are introduced in terms of two time dependent functions of the cosmic scale factor, I(a)F2/4 and J(a)FF~/4, respectively, where F is the electromagnetic field strength and F~ is its dual. We study the form of J(a) that can generate a large seed magnetic field. Although the J(a) function is model dependent, the axion-photon coupling may open up a new window for a successful in ationary magnetogenesis.

Original languageEnglish
Article number110105
JournalChinese Journal of Physics
Volume53
Issue number6
DOIs
Publication statusPublished - 2015 Jan 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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