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BackgroundIndependence
, 2011
"... Intuitively speaking, a classical field theory is backgroundindependent if the structure required to make sense of its equations is itself subject to dynamical evolution, rather than being imposed ab initio. The aim of this paper is to provide an explication of this intuitive notion. Backgroundind ..."
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Intuitively speaking, a classical field theory is backgroundindependent if the structure required to make sense of its equations is itself subject to dynamical evolution, rather than being imposed ab initio. The aim of this paper is to provide an explication of this intuitive notion. Backgroundindependence is not a not formal property of theories: the question whether a theory is backgroundindependent depends upon how the theory is interpreted. Under the approach proposed here, a theory is fully backgroundindependent relative to an interpretation if each physical possibility corresponds to a distinct spacetime geometry; and it falls short of full backgroundindependence to the extent that this condition fails. ∗Forthcoming in General Relativity and Gravitation. 1
Physics of Gravitational Interaction: Geometry of Space or Quantum Field in Space?
, 2005
"... Gravity theory is the basis of modern cosmological models. ThirringFeynman’s tensor field approach to gravitation is an alternative to General Relativity (GR). Though Field Gravity (FG) approach is still developing subject, it opens new understanding of gravitational interaction, stimulates novel e ..."
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Gravity theory is the basis of modern cosmological models. ThirringFeynman’s tensor field approach to gravitation is an alternative to General Relativity (GR). Though Field Gravity (FG) approach is still developing subject, it opens new understanding of gravitational interaction, stimulates novel experiments on the nature of gravity and gives possibility to construct new cosmological models in Minkowski space. According to FG, the universal gravity force is caused by exchange of gravitons the quanta of gravity field. Energy of this field is welldefined and excludes the singularity. All classical relativistic effects are the same as in GR, though there are new effects, such as free fall of rotating bodies, scalar gravitational radiation, surface of relativistic compact bodies, which may be tested experimentally. The intrinsic scalar (spin 0) part of gravity field corresponds to ”antigravity ” and only together with the pure tensor (spin 2) part gives the usual Newtonian force. Laboratory and astrophysical experiments for testing new predictions of FG, will be performed in near future. In particular observations with bar and interferometric detectors, like Explorer, Nautilus, LIGO and VIRGO, will check the predicted scalar gravitational