How Can We Erase States Inside a Black Hole?

@article{Hwang2018HowCW,
  title={How Can We Erase States Inside a Black Hole?},
  author={Junha Hwang and Hyosub Park and Dong-han Yeom and Heeseung Zoe},
  journal={Journal of the Korean Physical Society},
  year={2018},
  volume={73},
  pages={1420-1430}
}
We investigate an entangled system, which is analogous to a composite system of a black hole and Hawking radiation. If Hawking radiation is well approximated by an outgoing particle generated from pair creation around the black hole, such a pair creation increases the total number of states. There should be a unitary mechanism to reduce the number of states inside the horizon for black hole evaporation. Because the infalling antiparticle has negative energy, as long as the infalling… 
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