Oscillating scalar fields in extended quintessence

Dan Li, Shi Pi, Robert J. Scherrer

We study a rapidly-oscillating scalar field with potential $V(\varphi )=k|\varphi {|}^n$ nonminally coupled to the Ricci scalar $R$ via a term of the form $(1-8\pi G_0\xi {\varphi }^2)R$ in the action. In…