منابع مشابه
Quasi-Local Energy in Loop Quantum Gravity
Although there is no known meaningful notion of the energy density of the gravitational field in general relativity, a few notions of quasi-local energy of gravity associated to extended but finite domains have been proposed. In this paper, the notions of quasi-local energy are studied in the framework of loop quantum gravity, in order to see whether these notions can be carried out at quantum ...
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The present status of the quasi-local mass, energy-momentum and angular-momentum constructions in general relativity is reviewed. First, the general ideas, concepts, and strategies, as well as the necessary tools to construct and analyze the quasi-local quantities, are recalled. Then, the various specific constructions and their properties (both successes and deficiencies are discussed. Finally...
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The quasi-local energy conservation law is derived from the vacuum Einstein’s equations on the timelike boundary surface in the canonical (2,2)-formalism of general relativity. The quasi-local energy and energy flux integral agree with the standard results in the asymptotically flat limit and in spherically symmetric spacetimes. PACS numbers: 04.20.Cv, 04.20.Fy, 04.20.-q, 04.30.-w Typeset using...
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Defining energy is a surprisingly difficult problem in general relativity. For instance, the energy density of the gravitational field of a planet at a particular point could be determined by a comoving observer measuring the kinetic energy of a freely falling object. Due to the equivalence principle both the object and the observer fall at equal rates. Therefore, the observer would not assign ...
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General Relativity differs from most classical field theories in that there is no welldefined notion of energy density for the gravitation field, as can be seen from Einstein’s principle of equivalence. Thus at best one can only hope to calculate the mass/energy contained within a domain, as opposed to at a point. Such a concept is referred to as quasi-local mass, that is, a functional which as...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2018
ISSN: 1029-8479
DOI: 10.1007/jhep06(2018)069