Aspects Of Gravitational Interaction
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Aspects Of Gravitational Interaction
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Author : S. K. Srivastava
language : en
Publisher: Nova Biomedical Books
Release Date : 1998
Aspects Of Gravitational Interaction written by S. K. Srivastava and has been published by Nova Biomedical Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Science categories.
The twentieth century has brought enormous changes in the physicist's understanding of the fundamental nature of the physical world. These changes were ushered in the century's first decade, with the advent of relativity and quantum theory. With advancing knowledge, the mystery surrounding the ultimate nature of the physical world has deepened, not lessened, and the search for the Holy Grail of a 'Grand Unified Theory' or 'Theory of Everything' continues. This book reveals, in considerable detail, the concepts that have arisen as a result of that search -- the 'state of art'. Contents: Introduction to the Theory of Manifolds; Tensors and Riemannian; Einstein's theory of gravity; Some important modifications of Einstein's theory of gravity; Interaction of quantum fields with classical gravity; Gauge theory of gravity; Kaluza-Kleii Theory.
Theory Of Gravitational Interactions
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Author : Maurizio Gasperini
language : en
Publisher: Springer
Release Date : 2016-11-25
Theory Of Gravitational Interactions written by Maurizio Gasperini and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-25 with Science categories.
This is the second edition of a well-received book that is a modern, self-contained introduction to the theory of gravitational interactions. The new edition includes more details on gravitational waves of cosmological origin, the so-called brane world scenario, and gravitational time-delay effects.The first part of the book follows the traditional presentation of general relativity as a geometric theory of the macroscopic gravitational field, while the second, more advanced part discusses the deep analogies (and differences) between a geometric theory of gravity and the gauge theories of the other fundamental interactions. This fills a gap within the traditional approach to general relativity which usually leaves students puzzled about the role of gravity. The required notions of differential geometry are reduced to the minimum, allowing room for aspects of gravitational physics of current phenomenological and theoretical interest, such as the properties of gravitational waves, the gravitational interactions of spinors, and the supersymmetric and higher-dimensional generalization of the Einstein equations. This textbook is primarily intended for students pursuing a theoretical or astroparticle curriculum but is also relevant for PhD students and young researchers.
Global Aspects In Gravitation And Cosmology
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Author : Pankaj S. Joshi
language : en
Publisher: Oxford University Press, USA
Release Date : 1993
Global Aspects In Gravitation And Cosmology written by Pankaj S. Joshi and has been published by Oxford University Press, USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Philosophy categories.
This book describes several basic results and applications of global aspects in gravitation theory and cosmology within the framework of Einstein's theory of gravity. Topics include results on the structure and topology of space-time, exact solutions to Einstein equations and singularities, the status of quantum gravity, and quantum effects near space-time singularities in strong curvature fields. Also covered are the global upper limits in cosmology on elementary particle masses which might constitute the dark matter of the universe. After discussing in detail the fundamental role played by global considerations in gravity and general relativity, the author points out the significant problems that remain: the nature and structure of space-time singularities, the cosmic censorship problem in black hole physics, and the issue of quantum effects in strong gravity fields. The author's treatment of gravitational collapse illustrates how powerfully-strong curvature naked singularities could result from the continual gravitational collapse of matter with several reasonable equations of state--including inflowing radiation, dust, or a perfect fluid. Students and mathematicians, astrophysicists, and physicists will find this theoretically rich book a landmark in relativity theory.
The Lighter Side Of Gravity
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Author : Jayant Vishnu Narlikar
language : en
Publisher: Cambridge University Press
Release Date : 1996-10-03
The Lighter Side Of Gravity written by Jayant Vishnu Narlikar and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-10-03 with Science categories.
Gravity is the most enigmatic of all known basic forces in nature. Yet it controls everything from the motion of ocean tides to the expansion of the entire Universe. Many books use technical jargon and high-powered maths to explain what gravity is all about. In The Lighter Side of Gravity, the presentation is beautifully clear and completely non-technical. Familiar analogies, interesting anecdotes and numerous illustrations are used throughout to get across subtle effects and difficult points. The coverage is, however, comprehensive and makes no compromise with accuracy. This second edition has been brought completely up to date and expanded to include the discovery of gigantic gravitational lenses in space, the findings of the COBE satellite, the detection of MACHOS, the investigations of the very early Universe and other new ideas in cosmology. In short, this lucid and stimulating book presents 'the lighter side' of the intriguing phenomena of 'gravity' to the student and general reader.
100 Years Of Gravity And Accelerated Frames
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Author : Jong-Ping Hsu
language : en
Publisher: World Scientific
Release Date : 2005
100 Years Of Gravity And Accelerated Frames written by Jong-Ping Hsu and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Science categories.
This collection of papers presents ideas and problems arising over the past 100 years regarding classical and quantum gravity, gauge theories of gravity, and spacetime transformations of accelerated frames. Both Einstein''s theory of gravity and the YangOCoMills theory are gauge invariant. The invariance principles in physics have transcended both kinetic and dynamic properties and are at the very heart of our understanding of the physical world. In this spirit, this book attempts to survey the development of various formulations for gravitational and YangOCoMills fields and spacetime transformations of accelerated frames, and to reveal their associated problems and limitations. The aim is to present some of the leading ideas and problems discussed by physicists and mathematicians. We highlight three aspects: formulations of gravity as a YangOCoMills field, first discussed by Utiyama; problems of gravitational theory, discussed by Feynman, Dyson and others; spacetime properties and the physics of fields and particles in accelerated frames of reference. These unfulfilled aspects of Einstein and YangOCoMills'' profound thoughts present a great challenge to physicists and mathematicians in the 21st century."
Aspects Of Modified Gravity
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Author : Shohreh Rahmati
language : en
Publisher:
Release Date : 2017
Aspects Of Modified Gravity written by Shohreh Rahmati and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Cosmology categories.
To date, General Relativity provides the best description of the gravitational interaction. It can accurately describe the motion of the planets within the solar system. However, on large scales general relativity is unable to explain the accelerating expansion of the Universe. Furthermore, so far, no complete self-consistent quantum theory of gravity based on General Relativity has been constructed. This has motivated physicists to explore alternative theories of gravity. In this thesis, I explore three different problems confronting gravitational physics. First, I explore a gauge theory of gravity. In these models one has to choose a gauge group and localize its global symmetries. In this thesis I consider a Yang-Mills gauge gravity of the conformal group SO(4,2). This work was done in collaboration with J. Gegenberg and S. Seahra. In the thesis, I show the derivation of the equations of motion and investigate the cosmological solutions in the case that the matter content of the Universe is a mixture of dust and radiation. Our model predicts a big bounce in the early Universe followed by a period of nearly exponential slow roll inflation that can last long enough to explain the large scale homogeneity of the cosmic microwave background. Furthermore, our model incorporates a de Sitter-like accelerating phase in the late Universe that agrees with observations. Second, I explore a toy model of gravity. This work is in collaboration with V. Husain and J. Ziprick. General relativity in four-dimensional spacetime is a complicated theory to quantize. Therefore, it is useful to study simpler models. Einstein gravity in three dimensions has been a subject of much study, especially for the purpose of quantization. However, there are no local propagating degrees of freedom in three dimensions. It is fruitful to study three-dimensional gravitational theories with local field degrees of freedom. I consider here a method for obtaining local degrees of freedom: three dimensional general relativity coupled to a pressureless “dust”. The dust time gauge is imposed with the upshot that the gravitational part of the Hamiltonian constraint becomes the physical Hamiltonian. This yields an extra degree of freedom in the metric field. In the thesis, I examine the action in canonical form and derive the evolution equations for the spatial metric and its conjugate momentum. Linearizing the equations about the flat background and imposing the transverse (or traceless) gauges indicates that the extra degree of freedom in the metric is a scalar mode and is ultralocal. Finally, I examine parametric resonance in cosmology, in collaboration with S. Seahra. According to dynamical dark energy models or theories of quantum gravity, it can be possible that kinetic terms appearing in matter actions get modified at high or low energies. The modification of the matter kinetic term can directly influence the parametric resonance and therefore the preheating phase near the end of inflation. Preheating is a process required to reheat the universe and create elementary particles. To incorporate exotic kinetic terms into this scenario, one can modify the action of the inflaton, the reheaton, or both. In the last part of this thesis, I study the effects of nonstandard kinetic terms from several different models on resonant preheating.
Inertia And Gravitation
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Author : Vesselin Petkov
language : en
Publisher: Minkowski Institute Press
Release Date : 2012-12-18
Inertia And Gravitation written by Vesselin Petkov and has been published by Minkowski Institute Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-18 with Inertia (Mechanics) categories.
This book fills a gap in the literature. So far there has been no book which deals with inertia and gravitation by explicitly addressing open questions and issues which have been hampering the proper understanding of these phenomena. The book places a strong emphasis on the physical understanding of the main aspects and features of inertia and gravitation. It discusses questions such as: Are inertial forces fictitious or real? Does Minkowski's four-dimensional formulation of special relativity provide an insight into the origin of inertia? Does mass increase relativistically? Why is the inertial mass equivalent to the gravitational mass? Are gravitational phenomena caused by gravitational interaction according to general relativity? Is there gravitational energy? Do gravitational waves carry gravitational energy? Can gravity be quantized?
Some Aspects Of The Interaction Of A Classical Gravitational Field With A Quantized Matter Field
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Author : Leopold Halpern
language : en
Publisher:
Release Date : 1967
Some Aspects Of The Interaction Of A Classical Gravitational Field With A Quantized Matter Field written by Leopold Halpern and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Gravitation categories.
Spin And Torsion In Gravitation
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Author : Venzo De Sabbata
language : en
Publisher: World Scientific
Release Date : 1994-08-31
Spin And Torsion In Gravitation written by Venzo De Sabbata and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-08-31 with Science categories.
This book gives an exposition of both the old and new results of spin and torsion effects on gravitational interactions with implications for particle physics, cosmology etc. Physical aspects are stressed and measurable effects in relation to other areas of physics are discussed.Among the topics discussed are: alternative ways of unifying gravity with electroweak and strong interactions by an energy dependent spin torsion coupling constant; the idea that all interactions can be understood as originating from spin curvature coupling; the possibility of cosmological models with torsion providing a solution to the cosmological constant problem; and a demonstration that torsion can lead directly to the quantization of space-time itself.
Gravitational And Colour Interactions As Different Aspects Of The Same Basic Interaction
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Author : Matti Pitkänen
language : en
Publisher:
Release Date : 1982
Gravitational And Colour Interactions As Different Aspects Of The Same Basic Interaction written by Matti Pitkänen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.