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We study the evolution of black hole collisions and ultraspinning black hole instabilities in higher dimensions. These processes can be efficiently solved numerically in an effective theory in the limit of large number of dimensions D. We…

High Energy Physics - Theory · Physics 2019-09-17 Tomas Andrade , Roberto Emparan , David Licht , Raimon Luna

There exists an upper limit on the mass of black holes when the cosmological constant $\Lambda$ is positive. We study the collision of two black holes whose total mass exceeds this limit. Our investigation is based on a recently discovered…

General Relativity and Quantum Cosmology · Physics 2009-10-22 Dieter Brill , Gary Horowitz , David Kastor , Jennie Traschen

We study collisions of boosted rotating black holes in $D=6$ and 7 spacetime dimensions with a non-zero impact parameter. We find that there exists an open set of initial conditions such that the intermediate state of the collision is a…

High Energy Physics - Theory · Physics 2021-11-30 Tomas Andrade , Pau Figueras , Ulrich Sperhake

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

We show that cosmic censorship takes an exceptionally complex and interesting form in the case of five-dimensional AdS-Kerr black holes, due to the unusually distant relation obtaining in that case between the black hole parameters and the…

High Energy Physics - Theory · Physics 2020-01-08 Brett McInnes

We test the cosmic censorship conjecture for a class of polarized AdS black branes (holes) in the Einstein-Maxwell theory at large number of dimensions $D$. We first derive a new set of effective equations describing the dynamics of the…

High Energy Physics - Theory · Physics 2020-05-20 Norihiro Iizuka , Akihiro Ishibashi , Kengo Maeda

Deterministic nature of general relativity is ensured by the strong cosmic censorship conjecture, which asserts that spacetime cannot be extended beyond Cauchy horizon with square integrable connection. Although this conjecture holds true…

General Relativity and Quantum Cosmology · Physics 2020-03-23 Akash K Mishra , Sumanta Chakraborty

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

The Ernst spacetime is a solution of the Einstein-Maxwell equations describing two charged black holes accelerating apart in a uniform electric (or magnetic) field. As the field approaches a critical value, the black hole horizon appears to…

General Relativity and Quantum Cosmology · Physics 2009-10-28 Gary T. Horowitz , Harrison J. Sheinblatt

Recently Hertog, Horowitz, and Maeda (HHM) (hep-th/0310054) have proposed that cosmic censorship can be violated in the AdS/CFT context. They argue that for certain initial data there is insufficient energy available to make a black hole…

High Energy Physics - Theory · Physics 2014-11-18 Veronika E. Hubeny , Xiao Liu , Mukund Rangamani , Stephen Shenker

Rotating and/or charged black hole spacetimes possess a Cauchy horizon, beyond which Einstein's equations of General Relativity cease to be deterministic. This led to the formulation of the Strong Cosmic Censorship conjecture that such…

General Relativity and Quantum Cosmology · Physics 2022-09-20 Marc Casals , Cássio I. S. Marinho

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

Strong cosmic censorship conjecture has been one of the most important leap of faith in the context of general relativity, providing assurance in the deterministic nature of the associated field equations. Though it holds well for…

General Relativity and Quantum Cosmology · Physics 2019-03-28 Mostafizur Rahman , Sumanta Chakraborty , Soumitra SenGupta , Anjan A. Sen

The fate of strong cosmic censorship is ultimately linked to the extendibility of perturbation across the Cauchy Horizon and known to be violated in the near extremal region of a charged de Sitter black hole. Similar violations can also be…

General Relativity and Quantum Cosmology · Physics 2020-11-10 Akash K Mishra

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

Recent work indicates that the strong cosmic censorship hypothesis is violated by nearly extremal Reissner-Nordstrom-de Sitter black holes. It was argued that perturbations of such a black hole decay sufficiently rapidly that the perturbed…

General Relativity and Quantum Cosmology · Physics 2018-06-06 Oscar J. C. Dias , Felicity C. Eperon , Harvey S. Reall , Jorge E. Santos

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…

General Relativity and Quantum Cosmology · Physics 2018-11-14 Vitor Cardoso , Joao L. Costa , Kyriakos Destounis , Peter Hintz , Aron Jansen

It was recently shown that Strong Cosmic Censorship might be violated for near-extremally-charged black holes in 4-dimensional de Sitter space under scalar perturbations. Here, we extend the study of neutral massless scalar perturbations in…

General Relativity and Quantum Cosmology · Physics 2019-04-02 Hang Liu , Ziyu Tang , Kyriakos Destounis , Bin Wang , Eleftherios Papantonopoulos , Hongbao Zhang

We adopt the energy momentum relation of charged particles to study the thermodynamics laws and weak cosmic censorship conjecture of $D$-dimensional $f(R)$ AdS black holes in different phase spaces by considering charged particle…

High Energy Physics - Theory · Physics 2020-04-22 Ke-Jian He , Guo-Ping Li , Xin-Yun Hu

We study the occurrence of naked singularities in the spherically symmetric collapse of radiation shells in a higher dimensional spacetime. The necessary conditions for the formation of a naked singularity or a black hole are obtained. The…

General Relativity and Quantum Cosmology · Physics 2008-11-26 S. G. Ghosh , R. V. Saraykar
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