Constant roll inflation in multifield models

Understand

Constant roll inflation is analyzed in the presence of multi scalar fields which are assumed to be described by a constant roll rate each.

• The different cases are studied and the corresponding potentials are reconstructed.
• The exact solutions are obtained, which show a similar behaviour to the single scalar field model.
• For one of the cases analyzed in the paper, the so-called adiabatic field also constant rolls while entropy perturbations become null, while the second case may lead to non-adiabatic perturbations.