P. G. Bergmann

Bio: P. G. Bergmann is an academic researcher. The author has contributed to research in topics: Quantum gravity & Gravitation. The author has an hindex of 8, co-authored 21 publications receiving 926 citations.

Topological properties and global structure of space-time

Abstract: 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.

Advances in the interplay between quantum and gravity physics

Abstract: Preface. Quantum Information and Quantum Black Holes J.D. Bekenstein. Atomic Clocks and Atom Interferometry C.J. Borde. Canonical Gravity and Mach's Principle: Kinematic and Dynamic Solutions of the Space Problem H.-H. von Borzeszkowski, H.-J. Treder. Radiation and Gravitation M.J. Clark. Torsion and Curvature as Commutator for Quantum Gravity V. de Sabbata, et al. Experimental Perspectives on the Interplay between Quantum and Gravity Physics G.T. Gillies, C.S. Unnikrishnan. Quantum Physics-motivated Measurements and Interpretation of Newtonian Gravitational Constant G.T. Gillies, C.S. Unnikrishnan. Recent Advances in Stochastic Gravity: Theory and Issues B.-L. Hu, E. Verdaguer. Quantum Cosmology: New Results and Prospects A.Y. Kamenshchik. Normal mode Quantization of Relativistic Scalar Fields in an Einstein Elevator A. Komar. Geometric Algebra, Dirac Wavefunctions and Black Holes A.N. Lasenby, C.J.L. Doran. Modern trends in Multidimensional Gravity and Cosmology V.R. Gravilov, V.N. Melnikov. Quantum Systems in weak Gravitational Fields G. Papini. Laboratory Searches for Effects beyond Classical Gravity R. Ritter, G.T. Gillies. Prospects for a Test of Measurement of (G-dot)/G by a SEE (Satellite Energy Exchange) Mission A.J. Sanders, G.T. Gillies. Langrangian Description of DualitySymmetric Fields D. Sorokin. The Cosmological Influence on Matter (Cosmic Objects, dark Matter and Particles) predicted by the 5-dimensional Projective Unified Field Theory E. Schmutzer. Ettore Majorana and Matvei Bronstein (1906-1938): Men and Scientists Y.P. Stepanovsky. Dualism between Space-Time and Matter analyzed from epistemological Point of View R. Wahsner. The Thermodynamics of Black Holes R.M. Wald. Black Holes with Hair E.J.Weinberg. Subject Index.

Spinning Test-Particles in General Relativity. II

Abstract: A method for the derivation of the equations of motion of test particles in a given gravitational field is developed. The equations of motion of spinning test particles are derived. The transformation properties are discussed and the equations of motion are written in a covariant form.