Results 11 to 20 of about 11,504,041 (312)
Planck length in classical and quantum Hamiltonian formulations of general relativity
European Physical Journal C: Particles and Fields, 2023 The physical meaning of the Planck length ( $$\ell _{P}$$ ℓ P ) is investigated in the framework of the unconstrained synchronous variational formulation of classical general relativity (GR).
Claudio Cremaschini
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Spin-½ in classical general relativity [PDF]
Classical and Quantum Gravity, 2000 It is shown that models of elementary particles in classical general relativity (geons) will naturally have the transformation properties of a spinor if the spacetime manifold is not time orientable. From a purely pragmatic interpretation of quantum theory this explains why spinor fields are needed to represent particles.
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The Possibility of a Non-Lagrangian Theory of Gravity
Universe, 2021 General Relativity resembles a very elegant crystal glass: If we touch its principles, that is, its Lagrangian, there is a risk of breaking everything. Or, if we will, it is like a short blanket: Curing some problems creates new problems.
Celia Escamilla-Rivera, Júlio C. Fabris
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A tale of analogies: a review on gravitomagnetic effects, rotating sources, observers and all that
Journal of Physics Communications, 2023 Gravitoelectromagnetic analogies are somewhat ubiquitous in General Relativity, and they are often used to explain peculiar effects of Einstein’s theory of gravity in terms of familiar results from classical electromagnetism.
Matteo Luca Ruggiero, Davide Astesiano
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Galaxies, 2014 By phenomenologically assuming a slow temporal variation of the percent acceleration rate S̈S -1 of the cosmic scale factor S(t), it is shown that the orbit of a local binary undergoes a secular expansion.
Lorenzo Iorio
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Example of negative energy density in a classical electron model
Heliyon, 2022 Classical models of the electron have been predicted to have negative rest energy density in certain regions. Using the model of the electron by Blinder we show that there are regions containing negative energy density, although the integral of the ...
Nelson Christensen
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Formal statement of the special principle of relativity [PDF]
, 2013 While there is a longstanding discussion about the interpretation of the extended, general principle of relativity, there seems to be a consensus that the special principle of relativity is absolutely clear and unproblematic.
Gomori, Marton, Szabo, Laszlo E.
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Universe, 2022 The Dirac–Bergmann algorithm is a recipe for converting a theory with a singular Lagrangian into a constrained Hamiltonian system. Constrained Hamiltonian systems include gauge theories—general relativity, electromagnetism, Yang–Mills, string theory, etc.
J. David Brown
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Why Einstein did not believe that General Relativity geometrizes gravity [PDF]
, 2013 I argue that, contrary to folklore, Einstein never really cared for geometrizing the gravitational or (subsequently) the electromagnetic field; indeed, he thought that the very statement that General Relativity geometrizes gravity "is not saying anything
Lehmkuhl, D, Lehmkuhl, Dennis
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About the origins of the general theory of relativity: Einstein's search for the truth [PDF]
, 2005 On the 20th June 1933 Professor Einstein addressed a large and enthusiastic audience in the Victorian Gothic Bute Hall of the University of Glasgow. Einstein spoke 'About the Origins of the General Theory of Relativity'.
Trainer, M.
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