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THE NATURE OF GRAVITATIONAL SINGULARITIES [PDF]
International Journal of Modern Physics D, 2004 The nature of gravitational singularities, long mysterious, has now become clear through a combination of mathematical and numerical analysis. As the singularity is approached, the time derivative terms in the field equations dominate, and the singularity behaves locally like a homogeneous oscillatory spacetime.
David Garfinkle
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A $$1+5$$ 1 + 5 -dimensional gravitational-wave solution: curvature singularity and spacetime singularity [PDF]
European Physical Journal C: Particles and Fields, 2017 We solve a $$1+5$$ 1 + 5 -dimensional cylindrical gravitational-wave solution of the Einstein equation, in which there are two curvature singularities. Then we show that one of the curvature singularities can be removed by an extension of the spacetime ...
Yu-Zhu Chen, Wen-Du Li, Wu-Sheng Dai
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Gravitational Singularities [PDF]
Index AcademicGravitational singularities in general relativity are spacetime locations where the gravitational field becomes infinite. Scalar invariant curves of spacetime include a measure of matter density.
Nicolae Sfetcu
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Causal structure of singularity in non-spherical gravitational collapse [PDF]
European Physical Journal C: Particles and Fields, 2022 We investigate here the final state of gravitational collapse of a non-spherical and non-marginally bound dust cloud as modeled by the Szekeres spacetime.
Dipanjan Dey +3 more
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Strong gravitational lensing by a strongly naked null singularity [PDF]
Physical Review D, 2020 We study strong gravitational lensing in a static, spherically symmetric, naked singularity spacetime, without a photon sphere. The nature of the singularity is found to be lightlike.
Suvankar Paul
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Gravitational duals to the grand canonical ensemble abhor Cauchy horizons [PDF]
Journal of High Energy Physics, 2020 The gravitational dual to the grand canonical ensemble of a large N holographic theory is a charged black hole. These spacetimes — for example Reissner- Nordström-AdS — can have Cauchy horizons that render the classical gravitational dynamics of the ...
Sean A. Hartnoll +3 more
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Conformal structure of singularities in some varying fundamental constants bimetric cosmologies [PDF]
Scientific ReportsIn this paper, we explore the conformal structure of singularities arising from varying fundamental constants using the method of Penrose diagrams. We employ a specific type of bimetric model featuring two different metrics.
Konrad Marosek, Adam Balcerzak
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Asymptotic safety, singularities, and gravitational collapse [PDF]
Physics Letters B, 2010 Asymptotic safety (an ultraviolet fixed point with finite-dimensional critical surface) offers the possibility that a predictive theory of quantum gravity can be obtained from the quantization of classical general relativity. However, it is unclear what becomes of the singularities of classical general relativity, which, it is hoped, might be resolved ...
Roberto Casadio +2 more
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Gravitational lensing by Born-Infeld naked singularities [PDF]
Physical Review D, 2023 We examine the gravitational lensing phenomenon caused by photon spheres in the Born-Infeld naked singularity spacetime, where gravity is coupled with Born-Infeld electrodynamics.
Y. Chen +3 more
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A bouncing cosmology from VECROs [PDF]
European Physical Journal C: Particles and Fields, 2023 We argue that, in the same way that in a black hole space-time VECROs will form in order to cancel the gravitational effects of a collapsing mass shell and prevent the formation of a singularity, in a contracting universe a gas of VECROs will form to ...
Robert Brandenberger +1 more
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