The trouble with asymptotically safe inflation
  In this paper we investigate the perturbation theory of the asymptotically
safe inflation and we find that all modes of gravitational waves perturbation
become ghosts in order to achieve a large enough number of e-folds. Formally we
can calculate the power spectrum of gravitational waves perturbation, but we
find that it is negative. It indicates that there is serious trouble with the
asymptotically safe inflation.
