SPHERICALLY SYMMETRIC TRAPPING HORIZONS, THE MISNER SHARP MASS AND BLACK HOLE EVAPORATION

@article{Nielsen2009SPHERICALLYST,
  title={SPHERICALLY SYMMETRIC TRAPPING HORIZONS, THE MISNER SHARP MASS AND BLACK HOLE EVAPORATION},
  author={Alex Buus Nielsen and Dong-han Yeom},
  journal={International Journal of Modern Physics A},
  year={2009},
  volume={24},
  pages={5261-5285}
}
We discuss some of the issues relating to information loss and black hole thermodynamics in the light of recent work on local black hole horizons. Understood in terms of pure states evolving into mixed states, the possibility of information loss in black holes is closely related to the global causal structure of space–time, as is the existence of event horizons. However, black holes need not be defined by event horizons, and in fact we argue that in order to have a fully unitary evolution for… 
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