Results 21 to 30 of about 33,597 (156)
Galaxy-scale Test of General Relativity with Strong Gravitational Lensing [PDF]
Astrophysical Journal, 2021 Although general relativity (GR) has been precisely tested at the solar system scale, precise tests at a galactic or cosmological scale are still relatively insufficient.
Xiaohong Liu +3 more
semanticscholar +1 more source
Recursion relations for gravitational lensing [PDF]
General Relativity and Gravitation, 2020 The weak gravitational lensing formalism can be extended to the strong lensing regime by integrating a nonlinear version of the geodesic deviation equation.
B. D. Normann, C. Clarkson
semanticscholar +2 more sources
Fortschritte der Physik, Volume 71, Issue 8-9, September 2023., 2023 Abstract The momentum and Hamiltonian constraints of vacuum Einstein equations, within the Bowen‐York formalism, for two interacting black holes in close separation, with anti‐parallel spins and anti‐parallel linear momenta is studied. An analytical solution using perturbation theory is given.
Emel Altas, Emine Ertugrul, Bayram Tekin
wiley +1 more source
Advanced Photonics Research, Volume 4, Issue 7, July 2023., 2023 Combined with the polarization state of light, orbital angular momentum (OAM) can be utilized as a degree of freedom to selectively excite the desired multipoles in nanoparticles. Different scattering characteristics of the excited modes result in interesting features in the imparted optical forces which is of importance in various applications ...
Mohammad Mojtaba Sadafi +3 more
wiley +1 more source
Gravitational wave lensing beyond general relativity: Birefringence, echoes, and shadows [PDF]
Physical Review D, 2020 Gravitational waves (GW), as light, are gravitationally lensed by intervening matter, deflecting their trajectories, delaying their arrival and occasionally producing multiple images.
J. Ezquiaga, M. Zumalacárregui
semanticscholar +1 more source
Artificial Intelligence and Advanced Materials
Advanced Materials, Volume 35, Issue 23, June 8, 2023., 2023 Artificial intelligence in general and machine learning in particular are gaining ever more importance in science and technology. In materials science, they are taking over tedious screening tasks and helping design and discover materials based on both explicit and tacit previous knowledge possessed by the scientist.
Cefe López
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 3, March 2023., 2023 Abstract Giant volcanic eruptions have the potential to overturn civilizations. Yet, the driving mechanism and timescale over which batholithic magma reservoirs transition from non‐eruptible crystal mush to mobile melt‐dominated stages and our capacity to detect a pending super‐eruption remain obscure.
G. Weber, J. Blundy, D. Bevan
wiley +1 more source
Journal of High Energy Physics, 2020 We investigate the possible existence of graviballs, a system of bound gravitons, and show that two gravitons can be bound together by their gravitational interaction.
B. Guiot, A. Borquez, A. Deur, K. Werner
doaj +1 more source
IS THERE A DISTINCTIVE QUANTUM THEOLOGY?
Zygon®, Volume 58, Issue 1, Page 265-284, March 2023., 2023 Abstract Quantum mechanics (QM) is a favorite area of physics to feature in “science and religion” discussions. We argue that this is at least partly because the arcane results of QM can be deployed to make big theological claims by the linguistic sleight of hand of “register switching”—sliding imperceptibly from technical into everyday language using ...
Wilson C. K. Poon, Tom C. B. McLeish
wiley +1 more source
Parameters estimation and strong gravitational lensing of nonsingular Kerr-Sen black holes [PDF]
, 2020 The recent time witnessed a surge of interest in strong gravitational lensing by black holes is due to the Event Horizon Telescope (EHT) results, which suggest comparing the black hole lensing in both general relativity and heterotic string theory.
Sushant G. Ghosh +2 more
semanticscholar +1 more source