Quantum transitions of minimum energy for Hawking quanta in highly   excited black holes: problems for loop quantum gravity?
  By analysing some recent results by Yoon, which arise from loop quantum gravity and from the assumption of the locality of photon emission in a black hole, we argue that they are not consistent with our recent semi-classical results for highly excited black holes. Maybe that the results by Yoon can be correct for non-highly excited black holes, but, in any case, our analysis renders further problematical the match between loop quantum gravity and semi-classical theory. 
Christian Corda
gr-qc astro-ph.CO hep-th