Phys. Rev. D 106, 061904(2022)
Evaporating black holes and late-stage loss of soft hair
Peng Cheng1,2,*
1 Center for Joint Quantum Studies and Department of Physics, Tianjin University, 300350 Tianjin, People’s Republic of China.
2 Institute for Theoretical Physics, University of Amsterdam, 1090 GL Amsterdam, Netherlands.
* p.cheng.nl@outlook.com
Abstract
We present a paradox for evaporating black holes, which is common in most schemes trying to avoid the firewall by decoupling early and late radiation. At the late stage of the black hole evaporation, the decoupling between early and late radiation cannot be realized because the black hole has a very small coarse-grained entropy, then we are faced with the firewall again. We call the problem the hair-loss paradox as a pun on losing black hole soft hair during the black hole evaporation and the situation that the information paradox has put so much pressure on researchers.
