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Advances in the Interplay Between Quantum and Gravity Physics (Hardcover, 2002 ed.): Peter G. Bergmann, V. De Sabbata Advances in the Interplay Between Quantum and Gravity Physics (Hardcover, 2002 ed.)
Peter G. Bergmann, V. De Sabbata
R5,909 Discovery Miles 59 090 Ships in 10 - 15 working days

In this XVII Course of the International School of Cosmology and Gravitation devoted to "ADVANCES IN THE INTERPLAY BETWEEN QUANTUM AND GRAVITY PHYSICS" we have considered different aspects of the influence of gravity on quantum systems. In order to achieve this aim, in many lectures, seminars and discussions we have strengthened the interplay between gravity and quantum systems starting from the situation in the early universe based on astrophysical observations, up to the earthly based experiments with atom interferometry for probing the structure of space-time. Thus we have had timely lectures on the quantum field and horizon of a black hole including reviews of the problem of black holes thermodynamics and entropy, quantum information, quantum black holes, quantum evaporation and Hawking radiation, recent advances in stockastic gravity. We have also discussed quantum fluctuations in inflationary universe, quantum effects and reheating after inflation, and superplanckian energies in Hawking radiation. In this regard the subject of spinors in purely affine space-time and Dirac matter according to Weyl in the generalized theory of gravitation were developed . The dualism between space-time and matter has been deeply analyzed in order to see why, for general relativity, this is an obstacle for quantization of the theory. Also canonical Gravity and Mach's principle, torsion and curvature as commutator for Quantum Gravity and Dirac Geometry of real space-time were analysed, together with the problem of 5-Dimensional Projective Unified Field theory and Multidimensional Gravity and Cosmology.

Topological Properties and Global Structure of Space-Time (Hardcover, 1986 ed.): Peter G. Bergmann, Venzo De Sabbata Topological Properties and Global Structure of Space-Time (Hardcover, 1986 ed.)
Peter G. Bergmann, Venzo De Sabbata
R4,521 Discovery Miles 45 210 Ships in 10 - 15 working days

The Ninth Course of the International School of Cosmology and Gravita tion of the Ettore Majorana Centre for Scientific Culture is concerned with "Topological Properties and Global Structure of Space-Time." We consider this topic to possess great importance. Our choice has also been influenced by the fact that there are many quest ions as yet unre solved. Standard general relativity describes space-time as a four-dimensional pseudo-Riemannian manifold, but it does not prescribe its large-scale structure. Inorderto attempt answers to some topological questions, such as whether our universe is open or closed, whether it is orientable, and whether it is complete or possesses singularities, various theoretical approaches to global aspects of gravitational physics are presented here. As topological questions playa role in non-standard theories as weIl, it will be found that some of the lectures and seminar talks in this volume adopt the point of view of standard relativity, whereas others are based on different theories, such as Kaluza-Klein theories, bimetric theories, and supergravity. We have found it difficult to organize these papers into classes, say standard and non-standard theory, or models with and without singularities. One paper, by R. Reasenberg, is experimental. Its purpose was to give the theorists present an inkling of the opportunities, as weIl as the pitfalls, of experimental research in gravitational physics. Accordingly, we have arranged all contributions alphabetically, by first-named) author."

Topological Properties and Global Structure of Space-Time (Paperback, Softcover reprint of the original 1st ed. 1986): Peter G.... Topological Properties and Global Structure of Space-Time (Paperback, Softcover reprint of the original 1st ed. 1986)
Peter G. Bergmann, Venzo De Sabbata
R4,350 Discovery Miles 43 500 Ships in 10 - 15 working days

The Ninth Course of the International School of Cosmology and Gravita tion of the Ettore Majorana Centre for Scientific Culture is concerned with "Topological Properties and Global Structure of Space-Time." We consider this topic to possess great importance. Our choice has also been influenced by the fact that there are many quest ions as yet unre solved. Standard general relativity describes space-time as a four-dimensional pseudo-Riemannian manifold, but it does not prescribe its large-scale structure. Inorderto attempt answers to some topological questions, such as whether our universe is open or closed, whether it is orientable, and whether it is complete or possesses singularities, various theoretical approaches to global aspects of gravitational physics are presented here. As topological questions playa role in non-standard theories as weIl, it will be found that some of the lectures and seminar talks in this volume adopt the point of view of standard relativity, whereas others are based on different theories, such as Kaluza-Klein theories, bimetric theories, and supergravity. We have found it difficult to organize these papers into classes, say standard and non-standard theory, or models with and without singularities. One paper, by R. Reasenberg, is experimental. Its purpose was to give the theorists present an inkling of the opportunities, as weIl as the pitfalls, of experimental research in gravitational physics. Accordingly, we have arranged all contributions alphabetically, by first-named) author."

Cosmology and Gravitation - Spin, Torsion, Rotation, and Supergravity (Paperback, Softcover reprint of the original 1st ed.... Cosmology and Gravitation - Spin, Torsion, Rotation, and Supergravity (Paperback, Softcover reprint of the original 1st ed. 1980)
Peter G. Bergmann, Venzo De Sabbata
R1,631 Discovery Miles 16 310 Ships in 10 - 15 working days

For the Sixth Course of the International School of Cosmology and Gravitation of the "Ettore Maj orana" Centre for Scientific Cul- ture we choose as the principal topics torsion and supergravity, because in our opinion it is one of the principal tasks of today's theoretical physics to attempt to link together the theory of ele- mentary particles and general relativity. Our aim was to delineate the present status of the principal efforts directed toward this end, and to explore possible directions of work in the near future. Efforts to incorporate spin as a dynamic variable into the foundations of the theory of gravitation were poineered by E. Cartan, whose contributions to this problem go back half a century. Accord- ing to A. Trautman this so-called Einstein-Cartan theory is the sim- plest and most natural modification of Einstein's 1916 theory. F. Hehl has contributed a very detailed and comprehensive analysis of this topic, original view of non-Riemannian space-time. Characteristic of Einstein-Cartan theories is the enrichment of Riemannian geometry by torsion, the non-symmetric part of the otherwise metric-compatible affine connection. Torsion has a impact on the theory of elementary particles. According to V. de Sabbata, weak interactions can be based on the Einstein-Cartan geometry, in that the Lagrangian describing weak interactions and torsion inter-- action possess analogous structures, leading to a unification of weak and gravitational forces.

Advances in the Interplay Between Quantum and Gravity Physics (Paperback, Softcover reprint of the original 1st ed. 2002):... Advances in the Interplay Between Quantum and Gravity Physics (Paperback, Softcover reprint of the original 1st ed. 2002)
Peter G. Bergmann, V. De Sabbata
R5,826 Discovery Miles 58 260 Ships in 10 - 15 working days

In this XVII Course of the International School of Cosmology and Gravitation devoted to "ADVANCES IN THE INTERPLAY BETWEEN QUANTUM AND GRAVITY PHYSICS" we have considered different aspects of the influence of gravity on quantum systems. In order to achieve this aim, in many lectures, seminars and discussions we have strengthened the interplay between gravity and quantum systems starting from the situation in the early universe based on astrophysical observations, up to the earthly based experiments with atom interferometry for probing the structure of space-time. Thus we have had timely lectures on the quantum field and horizon of a black hole including reviews of the problem of black holes thermodynamics and entropy, quantum information, quantum black holes, quantum evaporation and Hawking radiation, recent advances in stockastic gravity. We have also discussed quantum fluctuations in inflationary universe, quantum effects and reheating after inflation, and superplanckian energies in Hawking radiation. In this regard the subject of spinors in purely affine space-time and Dirac matter according to Weyl in the generalized theory of gravitation were developed . The dualism between space-time and matter has been deeply analyzed in order to see why, for general relativity, this is an obstacle for quantization of the theory. Also canonical Gravity and Mach's principle, torsion and curvature as commutator for Quantum Gravity and Dirac Geometry of real space-time were analysed, together with the problem of 5-Dimensional Projective Unified Field theory and Multidimensional Gravity and Cosmology.

Albert Einstein (German, Paperback, Softcover Reprint of the Original 1st 1979 ed.): Peter C. Aichelburg, Peter G. Bergmann Albert Einstein (German, Paperback, Softcover Reprint of the Original 1st 1979 ed.)
Peter C. Aichelburg, Peter G. Bergmann
R1,871 Discovery Miles 18 710 Ships in 10 - 15 working days

Dort nun, bei den Helden, bei diesen wirklich vorbild- haften Menschen erscheint uns das Interesse fur die Person, fur den Namen, fur Gesiebt und Gebarde er- laubt und naturlich. H. Hesse, Das Glasperlenspiei Im Jahre 1979 feiert die Welt den 100. Geburtstag Albert Einsteins. Dies bietet Anlass zu einem Ruckblick auf sein Leben und sein wissenschaft- liches Werk, zu einem uberblick uber Einsteins Bedeutung fur unsere Zeit und zu einer Vorausschau auf kommende Jahre naturwissenschaftlicher Entwicklung. Einstein war zweifellos eine der Schlusselfiguren der Geistesgeschichte unseres Jahrhunderts. Sein Einfluss auf Physik, Philosophie und Politik ist unubersehbar. Eine der grossartigsten wissenschaftlichen Leistungen unserer Zeit, die Schoepfung der allgemeinen Relativitatstheorie, die wohl zugleich die Kroenung von Einsteins Lebenswerk bildet, hat sich uns erst in den letzten Jahren in ihrer vollen Bedeutung fur die Gesamtphysik erschlossen. Die Moeg- lichkeiten der Weltraumforschung, die es uns gestatten, die Scheuklappen der Erdatmosphare abzuwerfen und erstmals mit freiem Blick das All zu er- forschen, haben zu bedeutenden neuen Erkenntnissen gefuhrt und gezeigt, dass auch einige der weitreichendsten Folgerungen aus der Einsteinschen Theorie der uberprufung standhalten. Die allgemeine Relativitatstheorie, die bis vor kurzem in ihrer mathematischen Schwierigkeit und Komplexitat ein Aussenseiter unter den physikalischen Theorien war, erweist sich aber auch immer mehr zu einem Vorbild, nach dem nunmehr auch Theorien der Elementarteilchenphysik und sogar der Festkoerperphysik gestaltet werden. Mit der Herausgabe dieses Bandes haben wir uns die Aufgabe gestellt, Einsteins Einfluss auf das Denken des 20. Jahrhunderts anhand von Beitragen namhafter Wissenschaftler aufzuzeigen.

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