Constant roll inflation in multifield models
  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. Both cases can
fit well the Planck data by assuming the appropriate values for the free
parameters of the models.
