I'm trying to get an overview of cosmological models which include inflation. My aim is to study the numerics of nonlinear Klein- Gordon equations which in fact are the Friedmann equations in the FRLW metric. \begin{equation} \ddot{\phi}+3 \dot{\phi} H + V'(\phi) =0. \end{equation}
Here $H$ stands for the Hubble constant and $\phi$ is representing the inflation field. I know there are several anstatzes for the inflation, especially I'm interested in the different potentials $V$ which occur in different models and why they are chosen this way (just a rough argument).