Information recovery from evaporating rotating charged black holes

TL;DR

This paper demonstrates that evaporating charged, rotating black holes have timelike horizons near the singularity, allowing classical or quantum information to escape, challenging the classical notion that nothing escapes from black holes.

Contribution

It reveals that the apparent horizon of evaporating charged, rotating black holes is timelike, providing a potential information escape channel not present in classical stationary black holes.

Findings

Apparent horizon and region near r=0 are timelike in evaporating black holes.

Information can escape via this timelike region during evaporation.

Results apply broadly to astrophysical black holes with rotation.

Abstract

In classical gravity, nothing can escape from a black hole, not even light. In particular, this happens for stationary black holes because their horizons are null. We show, on the other hand, that the apparent horizon and the region near r = 0 of an evaporating charged, rotating black hole are both timelike. This implies that there exists a channel, via which classical or quantum information can escape to the outside, as the black hole evaporates. Since astrophysical black holes have at least some rotation, our results apply to all black holes in nature. We discuss the implications of our result.