The Non-Adiabatic Pressure Perturbation and Non-Canonical Kinetic Terms
  in Multifield Inflation
  The evolution of the non-adiabatic pressure perturbation during inflation
driven by two scalar fields is studied numerically for three different types of
models. In the first model, the fields have standard kinetic terms. The other
two models considered feature non-canonical kinetic terms; the first containing
two fields which are coupled via their kinetic terms, and the second where one
field has the standard kinetic term with the other field being a DBI field. We
find that the evolution and the final amplitude of the non-adiabatic pressure
perturbation depends strongly on the kinetic terms.
