Inflation with Multi-Vector-Hair: The Fate of Anisotropy

Details Inflation with Multi-Vector-Hair: The Fate of Anisotropy Inflation with Multi-Vector-Hair: The Fate of Anisotropy

2012-01-25

arxiv.org/abs/1201.5309v1

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 3 figures

Scientific paper

We study inflation with multiple vector fields. In the presence of non-trivial couplings between the inflaton and the vector fields, it turns out that no-hair conjecture does not hold and vector-hair appears. In the case of uniform couplings, nevertheless, we find that the universe approaches an isotropic final state after transient anisotropic inflationary phases. For general couplings, we numerically show attractors are anisotropic inflation. Even in these cases, it turns out that the inflation always tends to minimize the anisotropy in the expansion of the universe.

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