Download or read book Quantum Systems under Gravitational Time Dilation written by Magdalena Zych and published by Springer. This book was released on 2017-02-06 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis introduces a new theoretical tool to explore the notion of time and temporal order in quantum mechanics: the relativistic quantum "clock" framework. It proposes novel thought experiments showing that proper time can display quantum features, e.g. when a “clock” runs different proper times in superposition. The resulting new physical effects can be tested in near-future laboratory experiments (with atoms, molecules and photons as "clocks"). The notion of time holds the key to the regime where quantum theory and general relativity overlap, which has not been directly tested yet and remains largely unexplored by the theory. The framework also applies to scenarios in which causal relations between events become non-classical and which were previously considered impossible to address without refuting quantum theory. The relativistic quantum "clock" framework offers new insights into the foundations of quantum theory and general relativity.
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 Gravity s Time written by C. S. Unnikrishnan and published by CRC Press. This book was released on 2022-04-28 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is unique and exceptional in dealing with the notion of physical time rigorously, both logically and empirically. The central theme is the intimate relation between physical time and cosmic gravity. It establishes and explains, in an accessible manner, the one crucial physical fact that has been missed in the development of modern physics—that the enormous gravity of the matter and energy in the Universe is the controller and cause of the relativistic time. The material in the book is accurate and free of the ambiguities in the discussion of time and its modifications (dilation), synchronization of clocks, and simultaneity. The contents go beyond the current theories of relativity that fail to incorporate the cosmic gravity in their structure. The discussion of clocks in satellite navigational systems (like the GPS) is the most complete and accurate. The book offers several new insights, and it is the only available treatise on the complete physical truth about time. The contents are addressed to a wide range of readers, from general readers and students to experienced researchers, and will also appeal well to philosophers and historians of physics. This book has the enabling quality to deal with difficult questions about physical time, with unprecedented clarity and without paradoxes.
Download or read book Atom interferometric Test of the Equivalence Principle and Observation of a Quantum System in Curved Spacetime written by Christopher Burr Overstreet and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The theory of general relativity is based on the equivalence principle, which states that all gravitational effects vanish in any local measurement. This principle is the best-understood aspect of gravity and has been tested with high precision in classical experiments. However, there is no widely-accepted quantum theory of gravity, and the nature of the relationship between gravity and quantum mechanics is one of the most significant open problems in physics. We study the interaction of gravity with quantum systems in a light-pulse atom interferometer, which uses lasers to measure atomic positions and accelerations. The sensitivity of the interferometer is increased by utilizing large-momentum-transfer pulse sequences and a free-fall time of up to 2 s, made possible by the 10 m scale of the apparatus. The frequencies and angles of each interferometer pulse are optimized to suppress kinematic phase gradients by several orders of magnitude. We use this system to test the equivalence principle between 85Rb and 87Rb, finding no violation at the level of 10^-12 g. With a resolution of up to 1.4 x 10^-11 per shot, we demonstrate the highest relative acceleration sensitivity yet obtained in a laboratory setting. In addition, by operating the interferometer in a gradiometer configuration, we perform the first observation of a single quantum system in curved spacetime. Finally, we propose an experiment to observe gravitational time dilation with an atom interferometer.
Download or read book Quantum gravity without trouble written by René Friedrich and published by BoD – Books on Demand. This book was released on 2024-06-06 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large panorama of innovative suggestions and ideas for people interested in physics. Instead of complex theories and mathematical speculation, direct possibilities of pertinent simplification are shown, so that general relativity including quantum gravity is becoming accessible to a large audience. Prior knowledge of special relativity is recommended, but an overview is provided in the introduction. Contents: - Special relativity, briefly - The nature of time - The mistaken assumption of a spacetime manifold - Quantum gravity by elimination of spacetime - Black holes: the infinity at the event horizon - Gravitational attraction and repulsion - Understanding the wave-particle duality of light
Download or read book Modified and Quantum Gravity written by Christian Pfeifer and published by Springer Nature. This book was released on 2023-11-01 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses theoretical predictions and their comparison with experiments of extended and modified classical and quantum theories of gravity. The goal is to provide a readable access and broad overview over different approaches to the topic to graduate and PhD students as well as to young researchers. The book presents both, theoretical and experimental insights and is structured in three parts. The first addresses the theoretical models beyond special and general relativity such as string theory, Poincare gauge theory and teleparallelism as well as Finsler gravity. In turn, the second part is focused on the observational effects that these models generate, accounting for tests and comparisons which can be made on all possible scales: from the universe as a whole via binary systems, stars, black holes, satellite experiments, down to laboratory experiments at micrometer and smaller scales. The last part of this book is dedicated to quantum systems and gravity, showing tests of classical gravity with quantum systems, and coupling of quantum matter and gravity.
Download or read book University Physics written by OpenStax and published by . This book was released on 2016-11-04 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: University Physics is a three-volume collection that meets the scope and sequence requirements for two- and three-semester calculus-based physics courses. Volume 1 covers mechanics, sound, oscillations, and waves. Volume 2 covers thermodynamics, electricity and magnetism, and Volume 3 covers optics and modern physics. This textbook emphasizes connections between between theory and application, making physics concepts interesting and accessible to students while maintaining the mathematical rigor inherent in the subject. Frequent, strong examples focus on how to approach a problem, how to work with the equations, and how to check and generalize the result. The text and images in this textbook are grayscale.
Download or read book Solutions of Exercises of General Relativity Simplified Assessed written by Taha Sochi and published by Taha Sochi. This book was released on with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains detailed solutions of all the 606 exercises of my book: General Relativity Simplified & Assessed. These exercises represent an integral part of the original book as they fill many gaps and provide essential extensions and elaborations.
Download or read book A Sociological Examination of the Gift Economy written by Vjeran Katunarić and published by Emerald Group Publishing. This book was released on 2023-09-13 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the whole, this book presents gift-giving as an intuitive path toward a viable economy, society, and culture here on Earth, and even toward an amiable engagement with our cosmic surroundings in the future.
Download or read book Time in Quantum Mechanics written by Gonzalo Muga and published by Springer. This book was released on 2007-11-30 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: The treatment of time in quantum mechanics is still an important and challenging open question in the foundation of the quantum theory. This multi-authored book, written as an introductory guide for newcomers to the subject, as well as a useful source of information for the expert, covers many of the open questions. The book describes the problems, and the attempts and achievements in defining, formalizing and measuring different time quantities in quantum theory.
Download or read book Quantum Mechanics in Curved Space time written by Jürgen Audretsch and published by Springer Science & Business Media. This book was released on 1990 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: A survey of the empirical aspects, the conceptual basis, and the related fundamental problems, as well as the astrophysical and cosmological applications of the title subject. Specific topics include accelerated particle detectors and the operational meaning of the particle concept in curved space-t
Download or read book Time in Quantum Mechanics written by J.G. Muga and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time and quantum mechanics have, each of them separately, captivated s- entists and laymen alike, as shown by the abundance of popular publications on “time” or on the many quantum mysteries or paradoxes. We too have been seduced by these two topics, and in particular by their combination. Indeed, the treatment of time in quantum mechanics is one of the important and challenging open questions in the foundations of quantum theory. This book describes the problems, and the attempts and achievements in de?ning, formalizing and measuring di?erent time quantities in quantum theory, such as the parametric (clock) time, tunneling times, decay times, dwell times, delay times, arrival times or jump times. The theoretical analysis of several of these quantities has been controversial and is still subject to debate. For example, there are literally hundreds of research papers on the tunneling time. In fact, the standard recipe to link the observables and the formalism does not seem to apply, at least in an obvious manner, to time observables. This has posed the challenge of extending the domain of ordinary quantum mechanics.
Download or read book Gravity Gauge Theories and Quantum Cosmology written by J.V. Narlikar and published by Springer Science & Business Media. This book was released on 1986-07-31 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: For several decades since its inception, Einstein's general theory of relativity stood somewhat aloof from the rest of physics. Paradoxically, the attributes which normally boost a physical theory - namely, its perfection as a theoreti cal framework and the extraordinary intellectual achievement underlying i- prevented the general theory from being assimilated in the mainstream of physics. It was as if theoreticians hesitated to tamper with something that is manifestly so beautiful. Happily, two developments in the 1970s have narrowed the gap. In 1974 Stephen Hawking arrived at the remarkable result that black holes radiate after all. And in the second half of the decade, particle physicists discovered that the only scenario for applying their grand unified theories was offered by the very early phase in the history of the Big Bang universe. In both cases, it was necessary to discuss the ideas of quantum field theory in the background of curved spacetime that is basic to general relativity. This is, however, only half the total story. If gravity is to be brought into the general fold of theoretical physics we have to know how to quantize it. To date this has proved a formidable task although most physicists would agree that, as in the case of grand unified theories, quantum gravity will have applications to cosmology, in the very early stages of the Big Bang universe. In fact, the present picture of the Big Bang universe necessarily forces us to think of quantum cosmology.
Download or read book Surfing the Quantum World written by Frank S. Levin and published by Oxford University Press. This book was released on 2017 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ideas and phenomena of the quantum world are strikingly unlike those encountered in our visual world. This book shows why and how this is so via a gentle introduction to the principles of quantum theory. It is used to explain both ordinary microscopic phenomena like the structure of the Periodic Table of Elements and mind-bending phenomena
Download or read book Irreversible Time Physics written by Igor Taganov and published by Litres. This book was released on 2020-03-06 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: In modern science, including theoretical physics, as in the early classical mechanics, the unnatural reversible time of Newton, based on the medieval concept of geometric time by Nicholas Oresme, is still used. This “original sin” of natural sciences has unintended consequences and creates a set of paradoxes and methodological problems for science. The book explores two new models of essentially irreversible time – decelerating cosmological time and irreversible discrete time of a microcosm. It discusses recent astronomical observations that reveal evidence of the cosmological deceleration of the pace of time in the distant cosmos, in the solar system and on earth. The structure of the model of irreversible discrete time of a microcosm, as considered in the book, allows for the existence of both time and anti-time. In particular, the model predicts new uncertainty relations and violation of the mirror symmetry of the integral internal parity of the entire population of micro particles that correspond to current studies of elementary particle physics.
Download or read book On the Emergence of Time and Space in Closed Quantum Systems written by Tommaso Favalli and published by Springer. This book was released on 2024-03-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time, space and entanglement are the main characters in this book. Their nature is still a great mystery in physics and we study here the possibility that these three phenomena are closely connected, showing how entanglement can be at the basis of the emergence of time and space within closed quantum systems. We revisit and extend the Page and Wootters theory that was originally introduced in order to describe the emergence of time through entanglement between subsystems in a globally static, quantum Universe. In the book, after providing a complete review of the salient aspects of the theory, we establish a connection with recent research on the foundations of statistical mechanics and we provide a new understanding of the thermalization process. Furthermore, we generalize the framework in order describe the spatial degree of freedom and we provide a model of 3+1 dimensional, quantum spacetime emerging from entanglement among different subsystems in a globally "timeless" and "positionless" Universe. Finally, via the Page and Wootters theory, the evolution of quantum clocks within a gravitational field is treated and a time dilation effect is obtained in agreement with the Schwarzschild solution.
Download or read book Quantum Gravity written by Carlo Rovelli and published by Cambridge University Press. This book was released on 2004-11-15 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description
