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General relativity without general relativity
Physical Review D, 1978Recently one of us proposed a general theory of variable rest masses (VMT) compatible with post-Newtonian solar-system experiments for a wide range of its two parameters r and q, provided the asymptotic value of its fundamental field f is in a certain narrow range.
Jacob D. Bekenstein, Amnon Meisels
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Advanced Lectures on General Relativity
Lecture Notes in Physics, 2018These lecture notes are intended for starting PhD students in theoretical physics who have a working knowledge of General Relativity. The 4 topics covered are (1) Surface charges as conserved quantities in theories of gravity; (2) Classical and ...
G. Compère, Adrien Fiorucci
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The General Theory of Relativity
Physik in unserer Zeit, 2020ALL of the previous considerations have been based upon the assumption that all inertial systems are equivalent for the description of physical phenomena, but that they are preferred, for the formulation of the laws of nature, to spaces of reference in a
Farook Rahaman
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Singularities in general relativity
General Relativity and Gravitation, 1970The problem of singularities is examined from the standpoint of a local observer. A singularity is defined as a state with an infinite proper rest mass density. It is proved that any inhomogeneity and anisotropy in the distribution and motion of a nonrotating ideal fluid accelerates collapse. Collapse is also inevitable in a rotating fluid in the case
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General Covariance in General Relativity?
General Relativity and Gravitation, 1995In the authors' words, ``the mathematical approach to general relativity insists that all coordinate systems are equal''. In contradiction to this ``doctrine'' the authors claim that, for some problems in general relativity, restriction to a subclass of coordinates is not only convenient to simplify calculations but even necessary to understand the ...
D. R. Matravers +2 more
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Black hole thermodynamics: general relativity and beyond
General Relativity and Gravitation, 2019Black holes have often provided profound insights into the nature of gravity and the structure of space–time. The study of the mathematical properties of black objects is a major research theme of contemporary theoretical physics.
Sudipta Sarkar
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Stellar tidal disruption events in general relativity
General Relativity and Gravitation, 2018A tidal disruption event (TDE) ensues when a star passes too close to a supermassive black hole (SMBH) in a galactic center, and is ripped apart by its tidal field.
N. Stone +3 more
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Observables in General Relativity
Reviews of Modern Physics, 1961The notion of observable in general relativity differs profoundly from the corresponding concept in special relativity and in Newtonian physics. This is because in general relativity fixation of a frame of reference and gauge transformations are intertwined in a manner not encountered in any other area of physics.
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Generalizing General Relativity
2021In this chapter we review 5 popular models of modifying and/or generalizing our current understanding of spacetime. These are: Brans-Dicke theory, f(R) theory, Gauss-Bonnet theory, Kaluza-Klein theory, and finally Cartan’s theory of gravity.
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