Primordial Black Hole Generation in a Two-field Inflationary Model
  We summarize our work on the generation of primordial black holes in a type
of two-field inflationary models. The key ingredient is a sharp turn of the
background trajectory in field space. We show that certain classes of solutions
to the equations of motion exhibit precisely this kind of behavior. Among them
we find solutions, which describe a transition between an ultra-slow roll and a
slow roll phases of inflation.
