Curvaton mechanism after multi-field inflation
  The evolution of the curvature perturbation after multi-field inflation is
studied in the light of the curvaton mechanism. Past numerical studies show
that many-field inflation causes significant evolution of the curvature
perturbation after inflation, which generates significant non-Gaussianity at
the same time. We reveal the underlying mechanism of the evolution and show
that the evolution is possible in a typical two-field inflation model.
