Overspinning a nearly extreme charged black hole via a quantum tunneling process

TL;DR

This paper investigates how a nearly extreme charged black hole can potentially be spun up beyond the extremal limit through quantum tunneling of scalar particles, challenging the weak cosmic censorship conjecture.

Contribution

It demonstrates that quantum tunneling can cause a nearly extreme charged black hole to acquire enough angular momentum to violate cosmic censorship.

Findings

Absorption rate for scalar particles is nonzero.

Black hole can be spun up beyond extremality via quantum tunneling.

Potential violation of weak cosmic censorship conjecture.

Abstract

We examine a nearly extreme macroscopic Reissner-Nordstrom black hole in the context of semi-classical gravity. The absorption rate associated with the quantum tunneling process of scalar particles whereby this black hole can acquire enough angular momentum to violate the weak cosmic censorship conjecture is shown to be nonzero.