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.
6 pages, 1 figure, Conference proceedings for the Spanish Relativity Meeting (ERE 2014), Valencia, Spain, 1-5 Sept. 2014
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