Primordial black holes and associated gravitational waves in axion
  monodromy inflation
  In the axion monodromy inflation, the inflation is driven by the axion with
super-Planckian field values in a monomial potential with superimposed
sinusoidal modulations. The coupling of the axion to massless gauge fields can
induce copious particle production during inflation, resulting in large
non-Gaussian curvature perturbation that leads to the formation of primordial
black holes. In this paper, we explore the parameter space in the axion
monodromy inflation model that favors the formation of primordial black holes
with masses ranging from $10^8$ grams to $20$ solar masses. We also study the
associated gravitational waves and their detection in pulsar timing arrays and
interferometry experiments.
