Results 21 to 30 of about 99,723 (258)
Spacetime Structure near Generic Horizons and Soft Hair. [PDF]
Physical Review Letters, 2019 We explore the spacetime structure near nonextremal horizons in any spacetime dimension greater than two and discover a wealth of novel results: (i) Different boundary conditions are specified by a functional of the dynamical variables, describing ...
D. Grumiller +4 more
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On the Road to God: Einstein’s Imaginary Journey Around the Universe [PDF]
Философия и космология, 2023 A revived figure of teenage Albert Einstein is confronted at the threshold of the second millennium with a problem of a graphical likeness of the Lambert W function-based cosmological equations to a logarithmic-exponential discontinuous function that he ...
Zdeněk Smrčka
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Shadow cast and deflection angle of Kerr-Newman-Kasuya spacetime [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 We study the shadow cast or silhouette generated by a Kerr-Newman-Kasuya (KNK) spacetime (rotating dyon black hole). It is shown that in addition to the angular momentum of the black hole, the dyon charge also affects the shadow image of the KNK black ...
A. Övgün, I. Sakalli, J. Saavedra
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Quantum extension of the Kruskal spacetime [PDF]
Physical Review D, 2018 A new description of macroscopic Kruskal black holes that incorporates the quantum geometry corrections of loop quantum gravity is presented. It encompasses both the `interior' region that contains classical singularities and the `exterior' asymptotic ...
A. Ashtekar, J. Olmedo, Parampreet Singh
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International Journal of Modern Physics D, 2002 Spacetime is composed of a fluctuating arrangement of bubbles or loops called spacetime foam, or quantum foam. We use the holographic principle to deduce its structure, and show that the result is consistent with gedanken experiments involving spacetime measurements.
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Quantum instability of the Cauchy horizon in Reissner–Nordström–deSitter spacetime [PDF]
Classical and quantum gravity, 2019 In classical general relativity, the values of fields on spacetime are uniquely determined by their values at an initial time within the domain of dependence of this initial data surface.
S. Hollands, Robert M. Wald, Jochen Zahn
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THE COSMOLOGICAL SPACETIME [PDF]
International Journal of Modern Physics D, 2009 We present here the transformations required to recast the Robertson–Walker metric and Friedmann–Robertson–Walker equations in terms of observer-dependent coordinates for several commonly assumed cosmologies. The overriding motivation is the derivation of explicit expressions for the radius Rh of our cosmic horizon in terms of measurable quantities ...
Melia, Fulvio, Abdelqader, Majd
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Dark Energy Constraints from a five-dimensional AdS Black Hole via AdS/CFT [PDF]
EPJ Web of Conferences, 2019 There are many dark energy models having been investigated with constraint from observational data. The best dark energy candidate is ΛCDM model. In this work, our model has extended to include AdS/CFT correspondent, where the AdS black hole boundary ...
Jeong Yoobin +3 more
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Finsler spacetime geometry in physics [PDF]
International Journal of Geometric Methods in Modern Physics (IJGMMP), 2019 Finsler geometry naturally appears in the description of various physical systems. In this review, I divide the emergence of Finsler geometry in physics into three categories: dual description of dispersion relations, most general geometric clock and ...
C. Pfeifer
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