Quantum transitions of minimum energy for Hawking quanta in highly excited black holes: problems for loop quantum gravity?

TL;DR

This paper critiques recent loop quantum gravity results on black hole photon emissions, highlighting inconsistencies with semi-classical theories for highly excited black holes and questioning the compatibility of the two approaches.

Contribution

It provides a critical analysis of Yoon's loop quantum gravity results, emphasizing their inconsistency with semi-classical predictions for highly excited black holes.

Findings

Yoon's results may apply to non-highly excited black holes

Identifies inconsistencies between loop quantum gravity and semi-classical theories

Highlights challenges in unifying quantum gravity with classical black hole physics

Abstract

By analysing some recent results by Yoon, which arise from loop quantum gravity and from the assumption of the locality of photon emission in a black hole, we argue that they are not consistent with our recent semi-classical results for highly excited black holes. Maybe that the results by Yoon can be correct for non-highly excited black holes, but, in any case, our analysis renders further problematical the match between loop quantum gravity and semi-classical theory.