Black hole interior from loop quantum gravity

TL;DR

This paper uses loop quantum gravity to analyze black hole interiors, revealing a modified metric with a bounce and potential inner horizon at the Planck scale, differing significantly from classical solutions.

Contribution

It introduces a semiclassical loop quantum gravity model of black hole interiors, showing a bounce and inner horizon formation not present in classical solutions.

Findings

The metric inside the black hole differs from Schwarzschild at the Planck scale.

A bounce of the two-sphere occurs at a minimum radius.

An additional inner horizon may exist near r=0.

Abstract

In this paper we calculate modifications to the Schwarzschild solution by using a semiclassical analysis of loop quantum black hole. We obtain a metric inside the event horizon that coincides with the Schwarzschild solution near the horizon but that is substantially different at the Planck scale. In particular we obtain a bounce of the two-sphere for a minimum value of the radius and that it is possible to have another event horizon close to the r=0 point.