Production of high stellar-mass primordial black holes in trapped
  inflation
  Trapped inflation has been proposed to provide a successful inflation with a
steep potential. We discuss the formation of primordial black holes in the
trapped inflationary scenario. We show that primordial black holes are
naturally produced during inflation with a steep trapping potential. In
particular, we have given a recipe for an inflaton potential with which
particle production can induce large non-Gaussian curvature perturbation that
leads to the formation of high stellar-mass primordial black holes. These
primordial black holes could be dark matter observed by the LIGO detectors
through a binary black-hole merger. At the end, we have given an attempt to
realize the required inflaton potential in the axion monodromy inflation, and
discussed the gravitational waves sourced by the particle production.
