Would hawking radiation preferentially select the opposite charged particle of a pair and gradually reduce the charge of the rare case of a charged black hole to neutral? For instance a positive black hole would preferentially emit positrons and consume electrons, and vice versa.

 

Conversely could a statistical imbalance of absorption of electrons, since each pair creation event is an independent trial, lead to rather than black hole evaporation, black hole growth and the change over time from a non charged black hole to a negative black hole? Or would the law of large numbers forbid this? Isn't there still a possibility, given that there are probably billions upon billions of black holes, that one somewhere might do this? Would the exact same effect in the initial question prevent this?

Edited February 22, 20169 yr by Sorcerer

I am not aware of anything in Hawking radiation that can cause the black hole to change its charge. Not that the description given (by Hawking) in terms of the creation of particle-antiparticle pairs is not an accurate representation of what the mathematics says so it is dangerous to try and extrapolate from this analogy. The process is more related to how different observers can partition the vacuum into positive and negative energy states...

 

Here are a couple of articles that attempt to explain what happens slightly more accurately:

http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/hawking.html

http://backreaction.blogspot.de/2015/12/hawking-radiation-is-not-produced-at.html