A Classical Instability of Reissner-Nordstrom Solutions and the Fate of Magnetically Charged Black Holes

TL;DR

This paper demonstrates that small magnetically charged Reissner-Nordstrom black holes are classically unstable, which could lead to their complete evaporation and the formation of nonsingular magnetic monopoles.

Contribution

It reveals a classical instability in magnetically charged black holes within spontaneously broken gauge theories, suggesting new end states for such black holes.

Findings

Small magnetically charged black holes are unstable.

Instability may cause black hole evaporation.

Potential formation of nonsingular magnetic monopoles.

Abstract

Working in the context of spontaneously broken gauge theories, we show that the magnetically charged Reissner-Nordstrom solution develops a classical instability if the horizon is sufficiently small. This instability has significant implications for the evolution of a magnetically charged black hole. In particular, it leads to the possibility that such a hole could evaporate completely, leaving in its place a nonsingular magnetic monopole.