Results 11 to 20 of about 378,914 (304)
Gravitational Fields and Gravitational Waves [PDF]
Physics Essays, 2021 Abstract For any object with finite velocity, the relative velocity between them will affect the effect between them. This effect can be called the chasing effect (general Doppler effect). LIGO discovered gravitational waves and measured the speed of gravitational waves equal to the speed of light c. Gravitational waves are generated due to the
Yuan, Tony, Yuan, Tony
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Journal of High Energy Physics, 2023 Abstract We consider four-dimensional general relativity with vanishing cosmological constant defined on a manifold with a boundary. In Lorentzian signature, the timelike boundary is of the form σ × ℝ, with σ a spatial two-manifold that we take to be either flat or S2. In Euclidean signature we take the boundary to be S2 × S1.
Dionysios Anninos +2 more
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Gravitational lensing by gravitational waves [PDF]
Gravitation and Cosmology, 2008 9 pages, 3 ...
O. Yu. Tsupko +4 more
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Gravitational Waves from Gravitational Collapse [PDF]
Living Reviews in Relativity, 2003 68 pages including 13 figures; revised version accepted for publication in Living Reviews in Relativity (http://www.livingreviews.org)
Kimberly C. B. New, Chris L. Fryer
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Gravitational decoherence [PDF]
Classical and Quantum Gravity, 2017 We discuss effects of loss of coherence in low energy quantum systems caused by or related to gravitation, referred to as gravitational decoherence. These effects, resulting from random metric fluctuations, for instance, promise to be accessible by relatively inexpensive table-top experiments, way before the scales where true quantum gravity effects ...
Angelo Bassi +2 more
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Physical Review D, 2019 Particles in a yet unexplored dark sector with sufficiently large mass and small gauge coupling may form purely gravitational atoms (quantum gravitational bound states) with a rich phenomenology. In particular, we investigate the possibility of having an observable signal of gravitational waves or ultra high energy cosmic rays from the decay of ...
Nielsen, Niklas G. +2 more
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Modification of earth's gravity sphere [PDF]
Theoretical and Applied Mechanics, 2013 The standard radius of the Earth's gravity sphere is 917.000 km. Here we present that the radius is 1.400.000 km.
Vujičić Veljko A.
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Scalar–Tensor–Vector Modified Gravity in Light of the Planck 2018 Data
Universe, 2021 The recent data release by the Planck satellite collaboration presents a renewed challenge for modified theories of gravitation. Such theories must be capable of reproducing the observed angular power spectrum of the cosmic microwave background radiation.
John W. Moffat, Viktor Toth
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Aligned electric and magnetic Weyl fields [PDF]
, 2003 We analyze the spacetimes admitting a direction for which the relative electric and magnetic Weyl fields are aligned. We give an invariant characterization of these metrics and study the properties of its Debever null vectors.
Joan Josep Ferr, Juan Antonio Sáez
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Gravitation waves from QCD and electroweak phase transitions [PDF]
Journal of High Energy Physics, 2017 We investigate the gravitation waves produced from QCD and electroweak phase transitions in the early universe by using a 5-dimension holographic QCD model and a holographic technicolor model.
Yidian Chen, Mei Huang, Q. Yan
semanticscholar +1 more source