Behavior of Phantom Scalar Fields near Black Holes
  We present the accretion of a phantom scalar field into a black hole for
various scalar field potentials in the full non-linear regime. Our results are
based on the use of numerical methods and show that for all the cases studied
the black hole's apparent horizon mass decreases. We explore a particular
subset of the parameter space and from our results we conclude that this is a
very efficient black hole shrinking process because the time scales of the area
reduction of the horizon are short. We show that the radial equation of state
of the scalar field depends strongly on the space and time, with the condition
$\omega = p/\rho>-1$, as opposed to a phantom fluid at cosmic scales that
allows $\omega < -1$.
