Results 41 to 50 of about 35,096 (197)
Collapsing and Expanding Cylindrically Symmetric Fields with Ligh-tlike Wave-Fronts in General Relativity [PDF]
, 2002 The dynamics of collapsing and expanding cylindrically symmetric gravitational and matter fields with lightlike wave-fronts is studied in General Relativity, using the Barrabes-Israel method.
Pereira, Paulo R. C. T., Wang, A. Z.
core +2 more sources
Cosmological singularities in Bakry–Émery spacetimes
Journal of Geometry and Physics, 2014 15 pages; The wording of Theorem 1.5 is slightly clarified over the wording in the published version, with no change in the ...
Galloway, Gregory J., Woolgar, Eric
openaire +2 more sources
Restricted Maximin surfaces and HRT in generic black hole spacetimes
Journal of High Energy Physics, 2019 The AdS/CFT understanding of CFT entanglement is based on HRT surfaces in the dual bulk spacetime. While such surfaces need not exist in sufficiently general spacetimes, the maximin construction demonstrates that they can be found in any smooth ...
Donald Marolf +2 more
doaj +1 more source
Weak cosmic censorship with self-interacting scalar and bound on charge to mass ratio
Journal of High Energy Physics, 2021 We study the model of four-dimensional Einstein-Maxwell-Λ theory minimally coupled to a massive charged self-interacting scalar field, parameterized by the quartic and hexic couplings, labelled by λ and β, respectively.
Yan Song, Tong-Tong Hu, Yong-Qiang Wang
doaj +1 more source
Towards Black-Hole Singularity-Resolution in the Lorentzian Gravitational Path Integral
Universe, 2021 Quantum gravity is expected to resolve the singularities of classical general relativity. Based on destructive interference of singular spacetime-configurations in the path integral, we find that higher-order curvature terms may allow to resolve black ...
Johanna N. Borissova, Astrid Eichhorn
doaj +1 more source
Foliation of the Kottler-Schwarzschild-De Sitter Spacetime by Flat Spacelike Hypersurfaces
, 2011 There exist Kruskal like coordinates for the Reissner-Nordstrom (RN) black hole spacetime which are regular at coordinate singularities. Non existence of such coordinates for the extreme RN black hole spacetime has already been shown.
A. Goddard +22 more
core +1 more source
ARE CLASSICALLY SINGULAR SPACETIMES QUANTUM MECHANICALLY SINGULAR AS WELL? [PDF]
The Tenth Marcel Grossmann Meeting, 2006 Are the classical singularities of general relativistic spacetimes, normally defined by the incompleteness of classical particle paths, still singular if quantum mechanical particles are used instead? This is the question we will attempt to answer for particles obeying the quantum mechanical wave equations for scalar, null vector and spinor particles ...
Konkowski, D. A. +2 more
openaire +2 more sources
Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser
Advanced Science, EarlyView.An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu +9 more
wiley +1 more source
The structure of quantum singularities on a Cauchy horizon
Journal of High Energy PhysicsSpacetime singularities pose a long-standing puzzle in quantum gravity. Unlike Schwarzschild, a generic family of black holes gives rise to a Cauchy horizon on which, even in the Hartle-Hawking state, quantum observables such as ⟨T μν ⟩ — the expectation
Arvin Shahbazi-Moghaddam
doaj +1 more source
Supersymmetric traversable wormholes
Journal of High Energy Physics, 2020 We study traversable wormhole solutions in pure gauged N = 2 supergravity with and without electromagnetic fields, which are locally isometric under SO(2, 1) × SO(1, 1). The model allows for 1/2-BPS wormhole solutions whose corresponding globally defined
Andrés Anabalón +2 more
doaj +1 more source