2D dilaton-gravity from 5D Einstein equations

TL;DR

This paper derives a 2D dilaton-gravity model from 5D Einstein equations to study black hole evaporation, revealing that it prevents naked singularities and involves wormholes in black hole dynamics.

Contribution

It introduces a novel 2D dilaton-gravity model derived from 5D Einstein equations, enabling new insights into black hole formation and evaporation.

Findings

Prevents naked singularity formation

Allows wormholes to influence black hole processes

Provides a semiclassical framework for black hole evaporation

Abstract

A semiclassical two-dimensional dilaton-gravity model is obtained by dimensional reduction of the spherically symmetric five-dimensional Einstein equations and used to investigate black hole evaporation. It is shown that this model prevents the formation of naked singularity and allows spacetime wormholes to contribute the process of formation and evaporation of black holes.