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Spin In Gravity - Is It Possible To Give An Experimental Basis To Torsion? (Hardcover): Venzo De Sabbata, P.G. Bergmann, P.I.... Spin In Gravity - Is It Possible To Give An Experimental Basis To Torsion? (Hardcover)
Venzo De Sabbata, P.G. Bergmann, P.I. Pronin, George T. Gillies
R2,600 Discovery Miles 26 000 Ships in 12 - 17 working days

The introduction of spin is believed to be a necessary tool if one wishes to quantize general relativity. Then the main problem is to see if the introduction of spin generalizing the general relativity from a geometric point of view, i.e. through the concept of torsion, can be experimentally verified.

The reader can find in this book both theoretical and experimental arguments which show the necessity for the introduction of spin, and then of torsion, in gravity. In fact, torsion constitutes the more natural and simple way to introduce spin in general relativity. For that reason it is of fundamental importance to see if there are some experiences that indicate -- if not directly, then at least indirectly -- the presence of torsion. This book presents a discussion on experiments with a polarized-mass torsion pendulum, the search for galactic dark matter interacting with a spin pendulum, a description of a space-based method for determination of the gravitational constant and space-based measurements of spin in gravity, as well as a discussion on theoretical arguments, for instance the nature of torsion and nonmetricity, the viability of gravitational theories with spin -- torsion and spin-spin interaction, many-dimensional gravitational theories with torsion, spinors on curved spaces, the spinors in real space -- time, etc.

We know that until now there has been no evidence for torsion, but this fact cannot prevent us from considering in some detail this implement of research that seems to be important from both a geometrical and a physical point of view.

The Gravitational Constant: Generalized Gravitational Theories and Experiments (Hardcover, 2004 ed.): V. De Sabbata, George T.... The Gravitational Constant: Generalized Gravitational Theories and Experiments (Hardcover, 2004 ed.)
V. De Sabbata, George T. Gillies, Vitaly N. Melnikov
R6,089 Discovery Miles 60 890 Ships in 10 - 15 working days

An up-to-date description of progress and current problems with the gravitational constant, both in terms of generalized gravitational theories and experiments either in the laboratory, using Casimir force measurements, or in space at solar system distances and in cosmological observations.
Contributions cover different aspects of the state and prediction of unified theories of the physical interactions including gravitation as a cardinal link, the role of experimental gravitation and observational cosmology in discriminating between them, the problem of the precise measurement and stability of fundamental physical constants in space and time, and the gravitational constant in particular.
Recent advances discussed include unified and scalar-tensor theories, theories in diverse dimensions and their observational windows, gravitational experiments in space, rotational and torsional effects in gravity, basic problems in cosmology, early universe as an arena for testing unified models, and big bang nucleosynthesis.

The Gravitational Constant: Generalized Gravitational Theories and Experiments (Paperback, Softcover reprint of the original... The Gravitational Constant: Generalized Gravitational Theories and Experiments (Paperback, Softcover reprint of the original 1st ed. 2004)
V. De Sabbata, George T. Gillies, Vitaly N. Melnikov
R5,889 Discovery Miles 58 890 Ships in 10 - 15 working days

An up-to-date description of progress and current problems with the gravitational constant, both in terms of generalized gravitational theories and experiments either in the laboratory, using Casimir force measurements, or in space at solar system distances and in cosmological observations.
Contributions cover different aspects of the state and prediction of unified theories of the physical interactions including gravitation as a cardinal link, the role of experimental gravitation and observational cosmology in discriminating between them, the problem of the precise measurement and stability of fundamental physical constants in space and time, and the gravitational constant in particular.
Recent advances discussed include unified and scalar-tensor theories, theories in diverse dimensions and their observational windows, gravitational experiments in space, rotational and torsional effects in gravity, basic problems in cosmology, early universe as an arena for testing unified models, and big bang nucleosynthesis.

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