We analyze quantum corrections on the naive $\phi^4$-Inflation. These typically lead to an inflaton potential which is non-analytic in the field. We consider both minimal and non-minimal couplings to gravity. For the latter case we also study unitarity of inflaton-inflaton scattering. Finally we confront these theories with the Planck data and show that quantum departures from the $\phi^4$-Inflaton model are severely constrained.
J. Joergensen, F. Sannino and O. Svendsen
Fri, 14 Mar 14