The Black Hole Interior in Quantum Gravity

TL;DR

This paper explores the quantum gravity description of black hole interiors, emphasizing how unitarity and complementarity reconcile the classical and quantum perspectives of black hole evolution.

Contribution

It provides a novel analysis of black hole interiors in quantum gravity, highlighting the role of microscopic degrees of freedom and the subtle relation between quantum mechanics and the equivalence principle.

Findings

Black hole interiors can be described in quantum gravity with unitarity preserved.

Complementarity explains the appearance of interior spacetime from microscopic degrees of freedom.

Quantum mechanics and the equivalence principle remain consistent despite subtle differences.

Abstract

We discuss the interior of a black hole in quantum gravity, in which black holes form and evaporate unitarily. The interior spacetime appears in the sense of complementarity because of special features revealed by the microscopic degrees of freedom when viewed from a semiclassical standpoint. The relation between quantum mechanics and the equivalence principle is subtle, but they are still consistent.