Anisotropic power-law k-inflation

Junko Ohashi, Jiro Soda, Shinji Tsujikawa

It is known that power-law k-inflation can be realized for the Lagrangian $P=Xg(Y)$, where $X=-(\partial \varphi {)}^2/2$ is the kinetic energy of a scalar field $\varphi$ and $g$ is an arbitrary…