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Inflationary Universe with Anisotropic Hair · Around

2009

Inflationary Universe with Anisotropic Hair

Watanabe, Masa-aki, Kanno, Sugumi, Soda, Jiro

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We study an inflationary scenario with a vector field coupled with an inflaton field and show that the inflationary universe is endowed with anisotropy for a wide range of coupling functions.

This anisotropic inflation is a tracking solution where the energy density of the vector field follows that of the inflaton field irrespective of initial conditions.
We find a universal relation between the anisotropy and a slow-roll parameter of inflation.
Our finding has observational implications and gives a counter example to the cosmic no-hair conjecture.

Built on

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Then

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Later among the works it cites.
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