Strong cosmic censorship in charged black-hole spacetimes: still subtle

TL;DR

This paper demonstrates that even with charged massive scalars, there remains a parameter space where Strong Cosmic Censorship can be violated in charged black-hole spacetimes with a positive cosmological constant, challenging previous assumptions.

Contribution

It shows that charged massive scalars do not universally uphold Strong Cosmic Censorship, revealing persistent subtle violations in certain parameter regimes.

Findings

Existence of a finite parameter region violating Strong Cosmic Censorship.

Charged massive scalars do not always prevent violations.

Violations persist despite additional scalar fields.

Abstract

It was recently shown that Strong Cosmic Censorship may be violated in highly charged black-hole spacetimes living in a universe with a positive cosmological constant. Several follow-up works have since suggested that such result, while conceptually interesting, cannot be upheld in practice. We focus here on the claim that the presence of charged massive scalars suffices to save Strong Cosmic Censorship. To the contrary, we show that there still exists a finite region in parameter space where Strong Cosmic Censorship is expected to be violated.