Results 31 to 40 of about 681 (164)
Inner horizon instability and the unstable cores of regular black holes
Journal of High Energy Physics, 2021 Regular black holes with nonsingular cores have been considered in several approaches to quantum gravity, and as agnostic frameworks to address the singularity problem and Hawking’s information paradox.
Raúl Carballo-Rubio +4 more
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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
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
Advanced Science, EarlyView.Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel +3 more
wiley +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
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
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
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Quantum Black Holes and (Re)Solution of the Singularity
Universe, 2021 Classical general relativity predicts the occurrence of spacetime singularities under very general conditions. Starting from the idea that the spacetime geometry must be described by suitable states in the complete quantum theory of matter and gravity ...
Roberto Casadio
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Universal Entanglement and an Information‐Complete Quantum Theory
Advanced Physics Research, EarlyView.This Perspective summarize an informationcomplete quantum theory which describes a fully quantum world without any classical systems and concepts. Here spacetime/gravity, having to be a physical quantum system, universally entangles matter (matter fermions and their gauge fields) as an indivisible trinity, and encodes information‐complete physical ...
Zeng‐Bing Chen
wiley +1 more source
Singular sources in Demiański–Newman spacetimes [PDF]
Classical and Quantum Gravity, 2006 22 pages, 5 figures; submitted to Classical and Quantum ...
Manko, V. S., Martin, J., Ruiz, E.
openaire +2 more sources