Anisotropic inflation with non-abelian gauge kinetic function

作者：Murata Keiju^*; Soda Jiro

来源：Journal of Cosmology and Astroparticle Physics, 2011, 2011(6): 037.

DOI：10.1088/1475-7516/2011/06/037

• inflation
• physics of the early universe

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.

• 出版日期2011-6