Hearts of Darkness: the inside out probing of black holes

TL;DR

This paper explores the possibility that quantum gravity effects in non-singular black holes could influence their external environment, suggesting astronomical observations might reveal insights into their interiors.

Contribution

It challenges the common assumption that quantum effects are confined inside black holes, proposing strong correlations between interior and exterior physics.

Findings

Theoretical evidence for correlations between black hole interior and exterior.

Astronomical tests could provide insights into black hole interiors.

Non-singular black holes may not hide their inner core from external observations.

Abstract

Classical black holes shield us from the singularities that inevitably appear in general relativity. Being singularity regularization one of the main landmarks for a successful theory of quantum gravity, quantum black holes are not obliged to hide their inner core from the outside world. Notwithstanding the aforesaid, it is often implicitly assumed that quantum gravity effects must remain confined to black hole interiors. In this essay we argue in the opposite direction, discussing theoretical evidence for the existence of strong correlations between the physics inside and outside non-singular black holes. We conclude that astronomical tests of the surroundings of black holes can provide invaluable information about their so-far unexplored interiors.