Non-thermal Production of Dark Matter from Primordial Black Holes
  We present a scenario for non-thermal production of dark matter from
evaporation of primordial black holes. A period of very early matter domination
leads to formation of black holes with a maximum mass of $\simeq 2 \times 10^8$
g, whose subsequent evaporation prior to big bang nucleosynthesis can produce
all of the dark matter in the universe. We show that the correct relic
abundance can be obtained in this way for thermally underproduced dark matter
in the 100 GeV-10 TeV mass range. To achieve this, the scalar power spectrum at
small scales relevant for black hole formation should be enhanced by a factor
of ${\cal O}(10^5)$ relative to the scales accessible by the cosmic microwave
background experiments.
