Two-dimensional black holes in the limiting curvature theory of gravity

TL;DR

This paper explores a modified two-dimensional gravity model with limiting curvature, resulting in black holes with de Sitter-like cores and analyzing their formation and evaporation.

Contribution

It introduces a novel two-dimensional gravity model with limiting curvature and investigates black hole solutions and their dynamic properties.

Findings

Black holes have de Sitter-like cores instead of singularities.

The model admits Vaidya-type solutions for collapsing null fluid.

Insights into black hole evaporation processes.

Abstract

In this paper we discuss modified gravity models in which growth of the curvature is dynamically restricted. To illustrate interesting features of such models we consider a modification of two-dimensional dilaton gravity theory which satisfies the limiting curvature condition. We show that such a model describes two-dimensional black holes which contain the de Sitter-like core instead of the singularity of the original non-modified theory. In the second part of the paper we study Vaidya type solutions of the model of the limiting curvature theory of gravity and used them to analyse properties of black holes which are created by the collapse of null fluid. We also apply these solutions to study interesting features of a black hole evaporation.