The black hole is a thermal system as defined by the Hawking radiation hypothesis. The black hole emits radiation at a very low temperature. I would like to know how one defines its thermal conductivity?
I would advise against worrying too much about Hawking Radiation. Hawking radiation has never been observed and is based on the idea of quantum fluctuations in empty space. If the idea of quantum fluctuations in empty space is abandoned, then there will be no validity to the Hawking Radiation hypothesis.
Conference Paper THE UNIFICATION OF PHYSICS (Conference Paper)
Data Prerecording of Conference Presentation on the Unification of Physics