Phantom Inflation in Little Rip
  We study the phantom inflation in little rip cosmology, in which the current
acceleration is driven by the field with the parameter of state w < -1, but
since w tends to -1 asymptotically, the rip singularity occurs only at infinite
time. In this scenario, before the rip singularity is arrived, the universe is
in an inflationary regime. We numerically calculate the spectrum of primordial
perturbation generated during this period and find that the results may be
consistent with observations. This implies that if the reheating happens again,
the current acceleration might be just a start of phantom inflation responsible
for the upcoming observational universe.
