Are Horned Particles the Climax of Hawking Evaporation?

TL;DR

This paper examines whether quantum fluctuations can resolve black hole singularities and horizons, analyzing the CGHS model and proposing modifications to address its singularities and potential for resolving Hawking evaporation paradoxes.

Contribution

It critically evaluates the CGHS model's ability to eliminate singularities and horizons, proposing modifications to make the scenario consistent.

Findings

The generic CGHS solution is singular.

Proposed modifications could enable a non-singular, consistent scenario.

Potential resolution of black hole evaporation paradoxes.

Abstract

We investigate the proposal by Callan, Giddings, Harvey and Strominger (CGHS) that two dimensional quantum fluctuations can eliminate the singularities and horizons formed by matter collapsing on the nonsingular extremal black hole of dilaton gravity. We argue that this scenario could in principle resolve all of the paradoxes connected with Hawking evaporation of black holes. However, we show that the generic solution of the model of CGHS is singular. We propose modifications of their model which may allow the scenario to be realized in a consistent manner.