Anisotropic Power-law Inflation: A counter example to the cosmic no-hair conjecture
arXiv:1410.8643 · doi:10.1088/1742-6596/600/1/012026
Abstract
It is widely believed that anisotropy in the expansion of the universe will decay exponentially fast during inflation. This is often referred to as the cosmic no-hair conjecture. However, we find a counter example to the cosmic no-hair conjecture in the context of supergravity. As a demonstration, we present an exact anisotropic power-law inflationary solution which is an attractor in the phase space. We emphasize that anisotropic inflation is quite generic in the presence of anisotropic sources which couple with an inflaton.
arXiv comment6 pages, 1 figure, Conference proceedings for the Spanish Relativity Meeting (ERE 2014), Valencia, Spain, 1-5 Sept. 2014
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