Anisotropic inflation with non-abelian gauge kinetic function

Keiju Murata, Jiro Soda

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47 Citations (Scopus)

Abstract

We study an anisotropic inflation model with a gauge kinetic function for a non-abelian gauge field. We find that, in contrast to abelian models, the anisotropy can be either a prolate or an oblate type, which could lead to a different prediction from abelian models for the statistical anisotropy in the power spectrum of cosmological fluctuations. During a reheating phase, we find chaotic behaviour of the non-abelian gauge field which is caused by the nonlinear self-coupling of the gauge field. We compute a Lyapunov exponent of the chaos which turns out to be uncorrelated with the anisotropy.

Original languageEnglish
Article number037
JournalJournal of Cosmology and Astroparticle Physics
Volume2011
Issue number6
DOIs
Publication statusPublished - 2011 Jun 1

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Keywords

  • inflation
  • physics of the early universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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