Hawking Evaporation is Inconsistent with a Classical Event Horizon

leave a comment »

Borun D. Chowdhury, Lawrence M. Krauss
A simple classical consideration of black hole formation and evaporation times as measured by an observer at infinity demonstrates that an infall cutoff outside the event horizon of a black hole must be imposed in order for the formation time of a black hole event horizon to not exceed its evaporation time.
We explore this paradox quantitatively and examine possible cutoff scales and their relation to the Planck scale.
Our analysis suggests several different possibilities, none of which can be resolved classically and all of which require new physics associated with even large black holes and macroscopic event horizons:
(1) an event horizon never forms, for example due to radiation during collapse (resolving the information loss problem),
(2) and/or quantum effects may affect space-time near an event horizon in ways which alter infall as well as black hole evaporation itself.

Written by physicsgg

September 2, 2014 at 6:49 am


Tagged with

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: