Related Experiment Video
Updated: Jun 22, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
Inflationary universe with anisotropic hair
Masa-Aki Watanabe1, Sugumi Kanno, Jiro Soda
1Department of Physics, Kyoto University, Kyoto, 606-8501, Japan.
Abstract:
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 counterexample to the cosmic no-hair conjecture.
Related Concept Videos
Thermal Expansion
Gauss's Law: Spherical Symmetry
Divergence and Curl of Electric Field
Divergence and Curl of Magnetic Field
Divergence and Curl
Related Rates

