The Gravitational Constant: Generalized Gravitational Theories and Experiments
The Gravitational Constant: Generalized Gravitational Theories and Experiments

Author: V. de Sabbata

Publisher: Springer Science & Business Media

Published: 2004-03-31

Total Pages: 432

ISBN-13: 1402022425

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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
The Gravitational Constant: Generalized Gravitational Theories and Experiments

Author: V. de Sabbata

Publisher: Springer Science & Business Media

Published: 2004-03-31

Total Pages: 450

ISBN-13: 9781402019555

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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.

Theory and Experiment in Gravitational Physics
Theory and Experiment in Gravitational Physics

Author: Clifford M. Will

Publisher: Cambridge University Press

Published: 2018-09-27

Total Pages: 363

ISBN-13: 1108577490

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The 2015 centenary of the publication of Einstein's general theory of relativity, and the first detection of gravitational waves have focused renewed attention on the question of whether Einstein was right. This review of experimental gravity provides a detailed survey of the intensive testing of Einstein's theory of gravity, including tests in the emerging strong-field dynamical regime. It discusses the theoretical frameworks needed to analyze gravitational theories and interpret experiments. Completely revised and updated, this new edition features coverage of new alternative theories of gravity, a unified treatment of gravitational radiation, and the implications of the latest binary pulsar observations. It spans the earliest tests involving the Solar System to the latest tests using gravitational waves detected from merging black holes and neutron stars. It is a comprehensive reference for researchers and graduate students working in general relativity, cosmology, particle physics and astrophysics.

Topics On Strong Gravity: A Modern View On Theories And Experiments
Topics On Strong Gravity: A Modern View On Theories And Experiments

Author: Cesar Augusto Zen Vasconcellos

Publisher: World Scientific

Published: 2019-12-26

Total Pages: 299

ISBN-13: 9813277351

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'The book concentrates attention on extended alternative theories of gravity and on the best astrophysical laboratories to probe the strong gravity-field regime: black holes, pulsars and neutron stars … Readers will likely share the satisfaction the editor and contributors say they experienced as they organized the book.'SirReadaLotFor more than a century, our understanding of gravitational physics was based on Albert Einstein's theory of General Relativity, which fundamentally changed our understanding of the Universe, its origin, and its evolutionary process. General Relativity accurately describes a large number of phenomena on very different scales. As such, it has been very well tested and its remarkable predictions are compatible with most experimental and observational data. However, the observational and experimental results compatible with General Relativity fall in its vast majority under the weak gravitational field regime. In recent years, discrepancies between the data and the corresponding predictions of General Relativity have been observed and have generated intense research activity. One of the most critical aspects of General Relativity is the presence of singularities in extreme physical situations. These discrepancies indicate that either the parameters of the theory must be modified in the regime of strong field gravity/high energy and large space-time curvature, or the theory itself should be modified. In this book, we focus our attention on extended alternative gravity theories and the best astrophysical laboratories to probe the strong field regime: black holes, pulsars, and neutron stars.

General Relativity
General Relativity

Author: Hans Stephani

Publisher: Cambridge University Press

Published: 1990-06-29

Total Pages: 335

ISBN-13: 9780521370660

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This book is an excellent introduction to the subjects of gravitation and space-time structure. It presumes a good background in special relativity, electrodynamics, and classical mechanics. The book discusses the foundations of Riemannian geometry; the derivation of the Einstein field equations; linearised theory, far fields and gravitational waves; the invariant characterization of exact solutions; gravitational collapse; cosmology; and a final chapter deals with alternative gravitation theories and the problem of quantum gravity. This revised and correct edition brings the experimental evidence up to date. In addition, the sections on quantum gravity have been rewritten and enlarged, and now form a coherent introduction to this subject.

The Logical Solution of the Riddles of Gravity and Einstein's Theory
The Logical Solution of the Riddles of Gravity and Einstein's Theory

Author: George Kirakosyan

Publisher: Xlibris Corporation

Published: 2006-08-29

Total Pages: 81

ISBN-13: 1462836895

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SUMMARY In the offered work, unlike the majority of formal theories, the author considers a problem of gravitation with causally consecutive point of view. By logic of researches of known facts and existing theories of this direction, he comes to conclusion about unknown fundamental property of a matter causing the gravitational phenomena. The authors explanation is not difficult to mastering both with causal and quantitative points of view. However, it demands deep changes in accepted beliefs and approaches. On the basis of the offered causal essence of gravitation, the author deduces the law of universal gravitation of Newton; he defines the theoretical value of a gravitational constant and calculates known gravitational effects, with the use of simple mathematical reasoning only. The subsequent results of the offered concept are corresponding with the checked up results of Einsteins general theory of relativity (GTR). However, for planned new experiments, on detection of gravitational waves and gravymagnetic effect, negative results are predicted. The mentioned circumstance may allow judging about value of the offered explanation in a not-far future. Despite of complexities of the studied problem, the book is narrated in a free, polemical style, stipulated for a wide range of readers. * The picture used on the cover is the Galaxy Andromeda M 31, from site www.ASTROLAB.ru . Refer to www.physicsandlogic.com

Gravitational Theories Beyond General Relativity
Gravitational Theories Beyond General Relativity

Author: Iberê Kuntz

Publisher: Springer

Published: 2019-05-21

Total Pages: 82

ISBN-13: 3030211975

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Despite the success of general relativity in explaining classical gravitational phenomena, several problems at the interface between gravitation and high energy physics still remain open. The purpose of this thesis is to explore quantum gravity and its phenomenological consequences for dark matter, gravitational waves and inflation. A new formalism to classify gravitational theories based on their degrees of freedom is introduced and, in light of this classification, it is argued that dark matter is no different from modified gravity. Gravitational waves are shown to be damped due to quantum degrees of freedom. The consequences for gravitational wave events are also discussed. The non-minimal coupling of the Higgs boson to gravity is studied in connection with Starobinsky inflation and its implications for the vacuum instability problem is analyzed.