Download or read book Spin In Gravity Is It Possible To Give An Experimental Basis To Torsion written by Venzo De Sabbata and published by World Scientific. This book was released on 1998-07-08 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Spin in Gravity written by Peter Gabriel Bergmann and published by World Scientific Publishing Company Incorporated. This book was released on 1998 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Gravitational Constant Generalized Gravitational Theories and Experiments written by V. de Sabbata and published by Springer Science & Business Media. This book was released on 2004-03-31 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Geometric Algebra and Applications to Physics written by Venzo de Sabbata and published by CRC Press. This book was released on 2006-12-07 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing geometric algebra to the mainstream of physics pedagogy, Geometric Algebra and Applications to Physics not only presents geometric algebra as a discipline within mathematical physics, but the book also shows how geometric algebra can be applied to numerous fundamental problems in physics, especially in experimental situations. This
Download or read book Advances in the Interplay Between Quantum and Gravity Physics written by Peter G. Bergmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Classical and Quantum Nonlocality written by Peter G. Bergmann and published by World Scientific. This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date understanding of the progress and current problems of the interplay of nonlocality in the classical theories of gravitation and quantum theory. These problems lie on the border between general relativity and quantum physics, including quantum gravity.
Download or read book Classical and Quantum Nonlocality written by P G Bergmann and published by World Scientific. This book was released on 2000-08-21 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date understanding of the progress and current problems of the interplay of nonlocality in the classical theories of gravitation and quantum theory. These problems lie on the border between general relativity and quantum physics, including quantum gravity. Contents:Bohr's and Mach's Conceptions of Non-locality in Gravitation (H H v Borzeszkowski & H-J Treder)Non-locality Versus Locality: The Epistemological Background of the Einstein–Bohr Debate (H-H v Borzeszkowski & R Wahsner)Global Energy and Non-local Energy (J N Goldberg)Aspects of Physical Non-locality (A Komar)The EPR Argument and Quantum Non-locality (B K Datta et al.)Non-commuting Geometry and Spin Fluctuations (V de Sabbata et al.)Noncommutative Geometry for Pedestrians (J Madore)Some Topics and Trials on the Theory of Non-local Fields — Theory of Fields in Finsler Spaces and Fluctuations of Space–Time (Y Takano)Quantum Gravity Phenomenology (D V Nanopoulos)Hawking Radiation in String Theory and the String Phase of Black Holes (M R Medrano & N Sanchez)Non-locality, Entanglement and Quantum Computers (Z-L Zhang & Z-J Zhang) Readership: Cosmologists, astronomers, astrophysicists, high energy physicists and experimental physicists. Keywords:Nonlocality;Gravitation;Quantum Theory;General Relativity;Quantum Gravity
Download or read book Epioptics 11 written by Antonio Cricenti and published by World Scientific. This book was released on 2012-08-08 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is aimed at assessing the capabilities of state-of-the-art optical techniques in elucidating the fundamental electronic and structural properties of semiconductor and metal surfaces, interfaces, thin layers, and layer structures, and assessing the usefulness of these techniques for optimization of high quality multilayer samples through feedback control during materials growth and processing. Particular emphasis is dedicated to the theory of nonlinear optics and to dynamical processes through the use of pump–probe techniques together with the search for new optical sources. Some new applications of Scanning Probe Microscopy to Material Science and biological samples, dried and in vivo, with the use of different laser sources are also presented. Materials of particular interest are silicon, semiconductor–metal interfaces, semiconductor and magnetic multi-layers and III-V compound semiconductors. Contents:Epitaxial-Like Growth of Lead Phthalocyanine Layers on GaAs(001) Surfaces (L Riele, B Buick, E Speiser, B-O Fimland, P Vogt and W Richter)Optical Properties of Nanostructured Metamaterials (E Cortes, B S Mendoza, W L Mochan and G Ortiz)Ab Initio Long-Wavelength Properties of Metallic Systems: Iron and Magnesium (M Cazzaniga, L Caramella, N Manini, P Salvestrini and G Onida)Magnetic Second-Harmonic Generation from Interfaces and Nanostructures (J F McGilp)Optical Investigations of the Interface Formation between Organic Molecules and Semiconductor Surfaces (T Bruhn, L Riele, B-O Fimland, N Esser and P Vogt)Reflection Anisotropic Spectroscopy Studies of Thiolate/Metal Interfaces (D S Martin)The Physics of X-ray Free Electron Lasers (X-FELs): An Elementary Approach (P Rebernik Ribic and G Margaritondo)The Decisive Role of Interface Phonons in Polaron State Formation in Quantum Nanostructures (A Yu Maslov and O V Proshina)Dielectric Analysis on Optical Properties of Silver Nano Particles in ZrO2 Thin Film Prepared by Sol–Gel Method (M Wakaki and E Yokoyama)Towards Ab Initio Calculation of the Circular Dichroism of Peptides (E Molteni, G Onida and G Tiana)Dynamics and Spectral Properties of Free-Standing Negatively-Curved Carbon Surfaces (M De Corato and G Benedek) Readership: The book is a good reference for researchers that want to be involved in optical spectroscopy as a tool to study surfaces and interfaces. Keywords:Optics;Spectroscopy;Surfaces;Semiconductors;Reflectivity
Download or read book Superconducting Materials for High Energy Colliders written by Luisa Cifarelli and published by World Scientific. This book was released on 2001 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ELOISATRON (ELN) Project aims at a future proton supercollider with 100-500 TeV energy per beam and 1034-1036 cm-2s-1 luminosity. While the Large Hadron Collider (LHC) is being implemented at CERN, it is very timely to study the feasibility of the next generation of hadron colliders at the extreme limits of energy and luminosity. In this respect, the achievement of extremely high magnetic fields and the production of accelerating rf cavities with very low losses are a crucial point in the actual construction design of such a collider. The search for superconducting materials with suitable properties to be used in this field has gained a new impulse after the discovery of the so-called high temperature superconducting compounds (HTSCs) with superconducting critical temperatures higher than 100 K. Besides the critical temperatures, the transport performances of this class of compounds are still very far from allowing applications in extremely high energy colliders. On the other hand, in the last few years, the technological and scientific improvements obtained for both the HTSCs and the conventional superconducting materials are very promising.This book reviews the recent status of R&D on the rising generation of superconducting materials for accelerator magnets and cavities, and discusses novel aspects and ideas in this domain.
Download or read book Innovative Detectors for Supercolliders written by Eugenio Nappi and published by World Scientific. This book was released on 2004-08-10 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: The possible upgrade of LHC or a future generation of colliders at the extreme limits of energy and luminosity will require detectors based on very advanced technological solutions to fully exploit the physics opportunities offered. Major steps must be taken to design and realize devices that are able not only to handle very high rates but also to cope with the very harsh radiation environment without suffering any performance degradation. This book reviews the present status, current limits and recent developments in detection techniques and related aspects (simulation, signal acquisition, tracking, particle identification, etc.). Novel ideas in this domain are discussed with emphasis on the directions in which improvements in proven techniques are desired. The proceedings have been selected for coverage in: • Index to Scientific & Technical Proceedings® (ISTP® / ISI Proceedings) • Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings) • CC Proceedings — Engineering & Physical Sciences Contents:General AspectsTracking with Solid-State DetectorsTracking with Gaseous DetectorsLepton IdentificationHadron IdentificationCalorimetryTrends in Photon Detection Readership: Graduate students and researchers in accelerator and experimental high energy physics. Keywords:Supercolliders;Tracking Detectors;Particle Identification;Calorimetry;Photon Detectors;Radiation Damage;Cherenkov;Transition Radiation;Simulation;GRID
Download or read book Epioptics 8 written by Antonio Cricenti and published by World Scientific. This book was released on 2006 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the 8th Epioptics Workshop, held at the Ettore Majorana Foundation and Centre for Scientific Culture, Erice, Sicily. The book assesses the capabilities of state-of-the-art optical techniques in elucidating the fundamental electronic and structural properties of semiconductor and metal surfaces, interfaces, thin layers, and layer structures. The contributions consider the usefulness of these techniques for optimization of high quality multilayer samples through feedback control during materials growth and processing. Particular emphasis is placed on the theory of non-linear optics and on dynamical processes through the use of pump-probe techniques together with the search for new optical sources. Some new applications of Scanning Near-field Optical Microscopy to material science and biological samples, dried and in vivo, with the use of different laser sources are also included. Contents: Ab-Initio Theories for the Calculation of Excited States Properties (O Pulci et al.); Theory of Surface Second Harmonic Generation (W L Mochin & J A Maytorena); Lifetime of Excited States (B Hellsing); Raman Scattering as an Epioptic Probe for Low Dimensional Structures (E Speiser et al.); Molecular Assembly at Metal Surfaces Studied by Reflection Anisotropy Spectroscopy (D S Martin); Surface Preparation of Cu(110) for Ambient Environments (G E Isted et al.); Metal Nanofilms Studied with Infrared Spectroscopy (G Fahsold et al.); Optical Properties of Materials in an Undergraduate Physics Curriculum (J R Blanco); and other papers. Readership: Researchers, graduate and postgraduate students in physics and materials science."
Download or read book Deep Inelastic Scattering Dis 2001 Procs Of The 9th Intl Workshop written by Graziano Bruni and published by World Scientific. This book was released on 2002-10-18 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of DIS 2001 present the most updated status of deep inelastic scattering (DIS) physics. Topics like structure function measurements and phenomenology, QCD studies in DIS and photoproduction, spin physics and diffractive interactions are reviewed in detail, with emphasis on those studies that push the test of QCD and the Standard Model to the limits of their present range of validity, towards both the very high and the very low four-momentum transfers in the lepton-proton scattering. Moreover, this workshop coincided with the transition between the first period of experimentation at the HERA ep collider at DESY and the start of the updated HERA II operation — allowing a review of what has been learned up to now and a discussion on the main future directions of research in this field.
Download or read book The 9th International Workshop on Deep Inelastic Scattering DIS 2001 written by G. Bruni and published by World Scientific. This book was released on 2002 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of DIS 2001 present the most updated status of deep inelastic scattering (DIS) physics. Topics like structure function measurements and phenomenology, QCD studies in DIS and photoproduction, spin physics and diffractive interactions are reviewed in detail, with emphasis on those studies that push the test of QCD and the Standard Model to the limits of their present range of validity, towards both the very high and the very low four-momentum transfers in the lepton-proton scattering. Moreover, this workshop coincided with the transition between the first period of experimentation at the HERA ep collider at DESY and the start of the updated HERA II operation -- allowing a review of what has been learned up to now and a discussion on the main future directions of research in this field.
Download or read book Epioptics 9 Proceedings Of The 39th Course Of The International School Of Solid State Physics written by Antonio Cricenti and published by World Scientific. This book was released on 2008-01-15 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: This special volume contains the proceedings of the 9th Epioptics Workshop, held at the Ettore Majorana Foundation and Centre for Scientific Culture, Erice, Sicily, from July 20 to 26, 2006. The workshop was the 9th in the Epioptics series and the 39th of the International School of Solid State Physics.The workshop was aimed at assessing the capabilities of state-of-the-art optical techniques in elucidating the fundamental electronic and structural properties of semiconductor and metal surfaces, interfaces, thin layers, and layer structures, and at assessing the usefulness of these techniques for optimization of high-quality multilayer samples through feedback control during materials growth and processing. Particular emphasis is dedicated to the theory of non-linear optics and to dynamical processes through the use of pump-probe techniques together with the search for new optical sources. Some new applications of scanning probe microscopy to material science and biological samples, dried and in vivo, with the use of different laser sources are also presented.
Download or read book Charged and Neutral Particles Channeling Phenomena written by Sultan B. Dabagov and published by World Scientific. This book was released on 2010 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Channeling 2008", Charged and Neutral Particles Channeling Phenomena, is formed by the same title conference contributions. This volume includes papers by leading researchers from different world centers. Their recent results on the coherent phenomena of charged and neutral particles propagating through the structures of various sizes and periodicities are included here, along with historical reviews by pioneers of coherent Bremsstrahlung and channeling radiation as well as crystal channeling collimation.
Download or read book Epioptics 9 written by Antonio Cricenti and published by World Scientific. This book was released on 2008 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: This special volume contains the proceedings of the 9th Epioptics Workshop, held at the Ettore Majorana Foundation and Centre for Scientific Culture, Erice, Sicily, from July 20 to 26, 2006. The workshop was the 9th in the Epioptics series and the 39th of the International School of Solid State Physics. The workshop was aimed at assessing the capabilities of state-of-the-art optical techniques in elucidating the fundamental electronic and structural properties of semiconductor and metal surfaces, interfaces, thin layers, and layer structures, and at assessing the usefulness of these techniques for optimization of high-quality multilayer samples through feedback control during materials growth and processing. Particular emphasis is dedicated to the theory of non-linear optics and to dynamical processes through the use of pump-probe techniques together with the search for new optical sources. Some new applications of scanning probe microscopy to material science and biological samples, dried and in vivo, with the use of different laser sources are also presented. Sample Chapter(s). Longitudinal Gauge Theory of Surface Second Harmonic Generation (966 KB). Contents: Longitudinal Gauge Theory of Surface Second Harmonic Generation (B S Mendoza); Excited State Properties Calculations: From 0 to 3 Dimensional Systems (M Marsili et al.); High Spatial Resolution Raman Scattering for Nano-structures (E Speiser et al.); Vibrational Properties and the Miniband Effect in InGaAs/InP Superlattices (A D Rodrigues et al.); Electronic and Optical Properties of ZnO Between 3 and 32 eV (M Rakel et al.); Order and Clusters in Model Membranes: Detection and Characterization by Infrared Scanning Near-Field Microscopy (J Generosi et al.); Chemical and Magnetic Properties of NiO Thin Films Epitaxially Grown on Fe(001) (A Brambilla); Probing the Dispersion of Surface Phonons by Light Scattering (G Benedek & J P Toennies); and other papers. Readership: Researchers as well as graduate and postgraduate students in applied physics, specifically semiconductors and related areas, electron microscopy and condensed matter physics.
Download or read book Symmetries in Nuclear Structure written by Andrea Vitturi and published by World Scientific. This book was released on 2004-04-15 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Highly Specialized Seminar on “Symmetries in Nuclear Structure”, held in Erice, Italy, in March 2003, celebrated the career and the remarkable achievements of Francesco Iachello, on the occasion of his 60th birthday. Since the development of the interacting boson model in the early 1970s, the ideas of Iachello have provided a variety of frameworks for understanding collective behaviour in nuclear structure, founded on the concepts of dynamical symmetries and spectrum-generating algebras. The original ideas, which were developed for the description of atomic nuclei, have now been successfully extended to cover spectroscopic behaviour in other fields, such as molecular or hadronic spectra. More recently, the suggestion by Iachello of critical point symmetries to treat nuclei in shape/phase transitional regions has opened an exciting new front for both theoreticians and experimentalists. The talks presented at the meeting covered many of the most active forefront areas of nuclear structure as well as other fields where ideas of symmetries are being explored. Topics in nuclear structure included extensive discussions on dynamical symmetries, critical point symmetries, phase transitions, statistical properties of nuclei, supersymmetry, mixed symmetry states, shears bands, pairing and clustering in nuclei, shape coexistence, exotic nuclei, dipole modes, and astrophysics, among others. In addition, important sessions focused on talks by European laboratory directors (or their representatives) outlining prospects for nuclear structure, and the application of symmetry ideas to molecular phenomena. Finally, a special lecture by Nobel laureate Alex Mueller, on s and d wave symmetry in superconductors, presented a unique insight into an allied field. The proceedings have been selected for coverage in: • Index to Scientific & Technical Proceedings® (ISTP® / ISI Proceedings) • Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings) • CC Proceedings — Engineering & Physical Sciences Contents:Shape Coexistence and Its Symmetries (K Heyde & R Fossion)Some New Perspectives on Pairing in Nuclei (S Pittel & J Dukelsky)Challenges from Symmetry on the Drip Lines (D D Warner)Supersymmetry and Identical Bands (P von Brentano)Critical Point Nuclei in the Interacting Boson Model (N V Zamfir et al.)The Rich Structures of a Very Simple Hamiltonian (J Jolie)Phase Transitions in the Octupole Degree of Freedom (P G Bizzeti)Magnetic Moments from the Mediterranean to Mt Fuji (N Benczer-Koller et al.)Electric Dipole Excitations Close to the Particle Threshold (A Zilges)Spin–Isospin Excitations, Pairing and Shape Coexistence (E M de Guerra et al.)Shape-Phase and Order-to-Chaos Transitions in Nuclei (G Maino)Algebraic Description of n-Alkane Molecules (S Oss)Poem (R F Casten)and other papers Readership: Researchers and graduate students in nuclear and theoretical physics. Keywords:Dynamical Symmetries;Nuclear Structure;Critical Point Symmetries;Spectrum-Generating Algebras;Interactive Boson Models
