Spacetime Structure of an Evaporating Black Hole in Quantum Gravity

TL;DR

This paper explores how quantum gravity influences black hole evaporation, revealing a spacetime with a quantum ergosphere and a final Planck-sized remnant, using a renormalization group improved Vaidya metric.

Contribution

It introduces a quantum gravity-corrected model of black hole evaporation, highlighting the emergence of a quantum ergosphere and a remnant state.

Findings

Quantum ergosphere appears during evaporation.

Final state is a cold, Planck-sized remnant.

Horizon structures are modified by scale-dependent Newton's constant.

Abstract

The impact of the leading quantum gravity effects on the dynamics of the Hawking evaporation process of a black hole is investigated. Its spacetime structure is described by a renormalization group improved Vaidya metric. Its event horizon, apparent horizon, and timelike limit surface are obtained taking the scale dependence of Newton's constant into account. The emergence of a quantum ergosphere is discussed. The final state of the evaporation process is a cold, Planck size remnant.