This effect assumes that there exists a quantum field state in which "UP" modes are thermally populated, while "IN" modes are completely empty.  
This effect assumes that there exists a quantum field state in which "UP" modes are thermally populated, while "IN" modes are completely empty.  This effect can be derived from a different effect that explains what an accelerating observer will view from a vacuum state.  This phenomenon is a consequence of the similar Unruh effect, and one of the problems with this effect is that if we trace photons back in time they should eventually have wavelengths smaller than the Planck scale, which is known as the Trans- Planckian problem.  Sometimes named after Bekenstein, in this effect a particle-antiparticle pair is created, with one of the particles falling beneath the event horizon.  FTP, name this effect in which radiation is emitted from a black hole, named after a British physicist.
This effect assumes that there exists a quantum field state in which "UP" modes are thermally populated, while "IN" modes are completely empty.  
Bekenstein-{Hawking} radiation or effect