Inflation with Multi-Vector-Hair: The Fate of Anisotropy
| Autor: | Masa-aki Watanabe, Kei Yamamoto, Jiro Soda |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Inflation (cosmology) High Energy Physics - Theory Cosmology and Nongalactic Astrophysics (astro-ph.CO) Physics and Astronomy (miscellaneous) Isotropy FOS: Physical sciences State (functional analysis) General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Inflaton General Relativity and Quantum Cosmology Metric expansion of space Theoretical physics High Energy Physics - Theory (hep-th) Attractor Vector field Anisotropy Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | 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. 15 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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