Results 11 to 20 of about 1,803 (203)

Colliding branes and formation of spacetime singularities

Physics Letters B, 2008
four ...
Tziolas, Andreas, Wang, Anzhong
openaire   +4 more sources

A Primer on Spacetime Singularities I: Mathematical Framework

Universe
This article presents a comprehensive and rigorous overview of spacetime singularities within the framework of classical General Relativity. Singularities are defined through the failure of geodesic completeness, reflecting the limits of predictability ...
Jean-Pierre Luminet
doaj   +2 more sources

Bifurcation diagrams for spacetime singularities and black holes

European Physical Journal C: Particles and Fields
We reexamine the focusing effect crucial to the theorems that predict the emergence of spacetime singularities and various results in the general theory of black holes in general relativity.
Spiros Cotsakis
doaj   +7 more sources

On the initial singularity in Kantowski–Sachs spacetime [PDF]

The European Physical Journal C, 2021
AbstractThe emergent universe scenario is a proposal for resolving the Big Bang singularity problem in the standard Friedmann–Lemaitre–Robertson–Walker cosmology. In the context of this scenario, the Universe originates from a nonsingular static state.
Ghorani, Elham, Heydarzade, Yaghoub
openaire   +5 more sources

QUANTUM SINGULARITIES IN STATIC SPACETIMES [PDF]

International Journal of Modern Physics D, 2011
We review the mathematical framework necessary to understand the physical content of quantum singularities in static spacetimes. We present many examples of classical singular spacetimes and study their singularities by using wave packets satisfying Klein–Gordon and Dirac equations.
Pitelli, João Paulo M., Letelier, Patricio S.   +1 more
openaire   +3 more sources

Dynamic generation or removal of a scalar hair

Journal of High Energy Physics, 2023
We study dynamic processes through which the scalar hair of black holes is generated or detached in a theory with a scalar field non-minimally coupled to Gauss-Bonnet and Ricci scalar invariants.
Yunqi Liu, Cheng-Yong Zhang, Wei-Liang Qian, Kai Lin, Bin Wang   +4 more
doaj   +1 more source

Regular black holes without mass inflation instability

Journal of High Energy Physics, 2022
Generic models of regular black holes have separate outer and inner horizons, both with nonzero surface gravity. It has been shown that a nonzero inner horizon surface gravity results in exponential instability at the inner horizon controlled by this ...
Raúl Carballo-Rubio, Francesco Di Filippo, Stefano Liberati, Costantino Pacilio, Matt Visser   +4 more
doaj   +1 more source

Revisiting the second law and weak cosmic censorship conjecture in high-dimensional charged-AdS black hole: an additional assumption

Journal of High Energy Physics, 2023
The verification of the second law of black hole mechanics and the WCCC in the context of enthalpy as mass of the black hole and its related thermodynamic properties has not been tested through a vast number of literature in the recent past. Such studies
Md Sabir Ali, Hasan El Moumni, Jamal Khalloufi, Karima Masmar   +3 more
doaj   +1 more source

Quantum probes of spacetime singularities [PDF]

Physical Review D, 1995
12 pages, RevTeX, no figures, A few breif comments added and typos ...
Horowitz, Gary T., Marolf, Donald
openaire   +3 more sources

Analytic and asymptotically flat hairy (ultra-compact) black-hole solutions and their axial perturbations

Journal of High Energy Physics, 2022
In this work, we consider a very simple gravitational theory that contains a scalar field with its kinetic and potential terms minimally coupled to gravity, while the scalar field is assumed to have a coulombic form.
Athanasios Bakopoulos, Theodoros Nakas
doaj   +1 more source