Kerr-de Sitter Black Holes: Quantum Aspects and Cosmic Censorship Conjecture

TL;DR

This paper investigates whether quantum effects can violate the weak cosmic censorship conjecture in Kerr-de Sitter black holes, finding that quantum corrections actually reinforce the black hole's stability against horizon destruction.

Contribution

It provides the first analysis of quantum backreaction effects on the weak cosmic censorship conjecture in Kerr-de Sitter black holes using a test particle approach.

Findings

Quantum corrections enhance the horizon's stability.

Black holes remain stable against over-extremization with quantum effects.

wCCC remains valid in quantum Kerr-de Sitter backgrounds.

Abstract

In this article, we test the validity of the weak cosmic censorship conjecture (wCCC) in the background of a quantum Kerr-de Sitter (qKdS) black hole, incorporating exact backreaction from quantum matter fields. Using a test particle approach, we analyze whether an extremal qKdS black hole can be over-extremized to expose a naked singularity. Our results indicate that the black hole remains stable against horizon-destroying processes induced by infalling matter. Quantum corrections enhance the horizon's robustness rather than destabilize it, offering further evidence that wCCC remains preserved in the presence of quantum effects.