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We study the behaviour of a free massive scalar wave-packet near the Cauchy horizon of an $\mathrm{AdS}_2$ black hole and find that it becomes infinitely differentiable for smooth initial data, independently of the parameters describing the…

High Energy Physics - Theory · Physics 2021-06-21 Upamanyu Moitra

We study the optical appearance of Schwarzschild-de Sitter and Reissner-Nordstr\"{o}m-de Sitter black holes viewed by distant observers inside cosmological horizons. Unlike their asymptotically flat counterparts, due to the positive…

General Relativity and Quantum Cosmology · Physics 2024-03-05 Li-Ming Cao , Long-Yue Li , Xia-Yuan Liu , Yu-Sen Zhou

Using some probes, the violation of cosmic censorship conjecture in a general Kerr-Newman black hole is investigated. The result depends on many factors, like the relative sign of charge and rotation direction of the probe and black hole.…

General Relativity and Quantum Cosmology · Physics 2021-05-05 H. Khodabakhshi , F. Shojai

The weak cosmic censorship conjecture plays a foundational role in classical gravity by asserting that spacetime singularities are generically hidden behind event horizons. In this work, we explore its robustness in the…

General Relativity and Quantum Cosmology · Physics 2026-04-02 Yan-Qing Xu , Rui-Feng Zheng , Yu-Peng Zhang , Cheng-Yong Zhang

Penrose's Strong Cosmic Censorship conjecture safeguards determinism in General Relativity. Within the initial value approach to General Relativity, proof of Strong Cosmic Censorship preservation is predicated on the unique evolution of the…

General Relativity and Quantum Cosmology · Physics 2025-05-21 Anna Chrysostomou , Alan S. Cornell , Aldo Deandrea , Seong Chan Park

Investigating the quasinormal modes of a massive scalar field on the 3-dimensional black string (3dBS), we study the strong cosmic censorship (SCC) conjecture for the 3dBS in the T-dual relationship with the 3-dimensional rotating…

General Relativity and Quantum Cosmology · Physics 2022-11-11 Jeongwon Ho , Wontae Kim , Bum-Hoon Lee

A simple argument is given that a traversable Cauchy horizon inside a black hole is incompatible with unitary black hole evolution. The argument assumes the validity of black hole complementarity and applies to a generic black hole carrying…

High Energy Physics - Theory · Physics 2015-06-26 Larus Thorlacius

We examine the $C^{0}$-formulation of the strong cosmic censorship conjecture (SCC) from a quantum complexity-theoretic perspective and argue that for generic black hole parameters as initial conditions for the Einstein equations,…

General Relativity and Quantum Cosmology · Physics 2022-06-20 Aditya Iyer , Alexander Y. Yosifov , Vlatko Vedral

In classical General Relativity, the values of fields on spacetime are uniquely determined by their values at an initial time within the domain of dependence of this initial data surface. However, it may occur that the spacetime under…

General Relativity and Quantum Cosmology · Physics 2020-05-19 Stefan Hollands , Robert M. Wald , Jochen Zahn

This is the second and last paper of a two-part series in which we prove the $C^2$-formulation of the strong cosmic censorship conjecture for the Einstein-Maxwell-(real)-scalar-field system in spherical symmetry for two-ended asymptotically…

General Relativity and Quantum Cosmology · Physics 2019-02-25 Jonathan Luk , Sung-Jin Oh

We study cosmic censorship in the Reissner-Nordstrom charged black hole by means of quantum gravity holding near the apparent horizons. We consider a gedanken experiment whether or not a black hole with the electric charge $Q$ less than the…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Ichiro Oda

We investigate the weak cosmic censorship conjecture in Kerr-(anti-)de Sitter black holes under the scattering of a scalar field. We test the conjecture in terms of whether the black hole can exceed the extremal condition with respect to…

General Relativity and Quantum Cosmology · Physics 2018-09-18 Bogeun Gwak

It was recently shown that the Strong Cosmic Censorship conjecture might be violated for near-extremally-charged black holes in de Sitter space. Here, we extend our study to charged fermionic fields in the exterior of…

General Relativity and Quantum Cosmology · Physics 2019-06-27 Kyriakos Destounis

This is the first and main paper of a two-part series, in which we prove the $C^{2}$-formulation of the strong cosmic censorship conjecture for the Einstein-Maxwell-(real)-scalar-field system in spherical symmetry for two-ended…

General Relativity and Quantum Cosmology · Physics 2019-02-25 Jonathan Luk , Sung-Jin Oh

It has been shown that the Strong Cosmic Censorship (SCC) can be violated by a scalar field in a near-extremal Reissner-Nordstrom-de Sitter black hole. In this paper, we investigate the Strong Cosmic Censorship in a Born-Infeld-de Sitter…

High Energy Physics - Theory · Physics 2019-12-11 Qingyu Gan , Guangzhou Guo , Peng Wang , Houwen Wu

Under spherical symmetry, we show that the weak cosmic censorship holds for the gravitational collapse of the Einstein-Maxwell-charged scalar field system. Namely, for this system, with generic initial data, the formed spacetime…

General Relativity and Quantum Cosmology · Physics 2024-02-27 Xinliang An , Hong Kiat Tan

The cosmic censorship conjecture posits that singularities forming to the future of a regular Cauchy surface are hidden by an event horizon. Consequently any topological structures will ultimately collapse within the horizon of a set of…

General Relativity and Quantum Cosmology · Physics 2015-06-17 Alexander R. H. Smith , Robert B. Mann

The singularity problem has always been a focus of physicists' research. In order to solve this problem, Penrose proposed the cosmic censorship conjecture, but verifying this conjecture in different situations still faces many challenges.…

General Relativity and Quantum Cosmology · Physics 2024-10-07 Zhiqin Tu , Meirong Tang , Zhaoyi Xu

Cosmic censorship protects the outside world from black hole singularities and paves the way for assigning entropy to gravity at the event horizons. We point out a tension between cosmic censorship and the quantum backreacted geometry of…

General Relativity and Quantum Cosmology · Physics 2024-03-21 José Navarro-Salas

We investigate the instability of the Cauchy horizon caused by causality violation in the compact vacuum universe with the topology $B\times {\bf S}^{1}\times {\bf R}$, which Moncrief and Isenberg considered. We show that if the occurrence…

General Relativity and Quantum Cosmology · Physics 2009-10-28 Kengo Maeda , Akihiro Ishibashi