Hawking emission from quantum gravity black holes

TL;DR

This paper investigates quantum gravity effects on higher-dimensional black hole evaporation, focusing on non-commutative geometry inspired models that exhibit unique temperature behavior and emission characteristics, offering potential observational signatures.

Contribution

It provides a detailed analysis of brane/bulk scalar emission from non-commutative black holes, highlighting their distinctive maximum temperature and emission features beyond semi-classical models.

Findings

Black holes exhibit a maximum temperature unlike classical counterparts.

Low frequency modes dominate the emission spectrum.

Distinctive signatures could help probe quantum gravity effects.

Abstract

We address the issue of modelling quantum gravity effects in the evaporation of higher dimensional black holes in order to go beyond the usual semi-classical approximation. After reviewing the existing six families of quantum gravity corrected black hole geometries, we focus our work on non-commutative geometry inspired black holes, which encode model independent characteristics, are unaffected by the quantum back reaction and have an analytical form compact enough for numerical simulations. We consider the higher dimensional, spherically symmetric case and we proceed with a complete analysis of the brane/bulk emission for scalar fields. The key feature which makes the evaporation of non-commutative black holes so peculiar is the possibility of having a maximum temperature. Contrary to what happens with classical Schwarzschild black holes, the emission is dominated by low frequency field modes on the brane. This is a distinctive and potentially testable signature which might disclose further features about the nature of quantum gravity.