Quantum Universe The Essays On Quantum Mechanics Quantum Cosmology And Physics In General

As physics has progressed, its most fundamental theories have become more distant from everyday experience posing challenges for understanding, notably with quantum mechanics. This volume contains twenty-nine essays written to address such challenges. The essays address issues in quantum mechanics, quantum cosmology and physics in general. Examples include: How do we apply quantum mechanics to the whole universe when all observers are inside? What do we mean by past, present, and future in a four-dimensional universe? What is the origin of classical predictability in a quantum universe? Could physics predict non-computable numbers? Short personal recollections of Murray Gell-Mann and Stephen Hawking are included.The essays vary in length, style, and level but should be accessible to most physicists.

This book provides a compilation of in-depth articles and reviews on key topics within gravitation, cosmology and related issues. It is a celebratory volume dedicated to Prof. Thanu Padmanabhan ("Paddy"), the renowned relativist and cosmologist from IUCAA, India, on the occasion of his 60th birthday. The authors, many of them leaders of their fields, are all colleagues, collaborators and former students of Paddy, who have worked with him over a research career spanning more than four decades. Paddy is a scientist of diverse interests, who attaches great importance to teaching. With this in mind, the aim of this compilation is to provide an accessible pedagogic introduction to, and overview of, various important topics in cosmology, gravitation and astrophysics. As such it will be an invaluable resource for scientists, graduate students and also advanced undergraduates seeking to broaden their horizons.

This is a unique 21st-century monograph that reveals a basic, yet deep understanding of the universe, as well as the human mind and body OCo all from the perspective of quantum mechanics and quantum field theory.This book starts with both non-mathematical and mathematical preliminaries. It presents the basics of both non-relativistic and relativistic quantum mechanics, and introduces Feynman path integrals and their application to quantum fields and string theory, as well as some non-quantum applications. It then describes the quantum universe in the form of loop quantum gravity and quantum cosmology. Lastly, the book turns to the human body and mind, applying quantum theory to electro-muscular stimulation and consciousness.It can be used as a graduate (or advanced undergraduate) textbook for a two-semester course in quantum physics and its modern applications. Some parts of the book can also be used by engineers, biologists, psychologists and computer scientists, as well as applied mathematicians, both in industry and academia."

A collection of essays discussing the philosophy and foundations of quantum gravity. Written by leading philosophers and physicists in the field, chapters cover the important conceptual questions in the search for a quantum theory of gravity, and the current state of understanding among philosophers and physicists.

Introduction to quantum physics for the general reader.

The forty papers collected here honor one of the great scientists of our time--John Archibald Wheeler. In this volume are gathered the six issues of the journal Foundations of Physics (February through July 1986) that celebrate his seventy-fifth birthday. Enlivened by Professor Wheeler's celebrated drawings, the book captures and illuminates his many contributions to physics, including his discovery of the scattering matrix and his elucidation, with Niels Bohr, of the mechanism of nuclear fission, his many contributions to Einstein's theory of gravity (for instance, the black hole), his deep insights into quantum theory and measurement (the elementary quantum phenomenon), and his efforts to explain the origins of the quantum postulate and quantum gravity (the meaning circuit and the Wheeler-DeWitt Equation). The majority of the papers reflect and build on Professor Wheeler's revolutionary ideas. Many scientists are convinced that his insights into the foundation of modern-day physics will induce a profound change in our perception of the universe. This book will appeal to scientists and philosophers who wish to look at one man's rendering of the "big picture" through the eyes of his colleagues. The work is prefaced by a compilation of quotes from Professor Wheeler, edited by Kip S. Thorne and Wojciech Zurek. The contributors to Between Quantum and Cosmos are M. Alexander, A. Anderson, H. H. Barschall, J. D. Bekenstein, C. H. Bennett, P. G. Bergmann, V. B. Braginsky, D. R. Brill, L. Brown, I. Ciufolini, L. Cohen, M. Demianski, D. Deutsch, B. DeWitt, C. DeWitt-Morette, R. H. Dicke, B. d'Espagnat, R. P. Feynman, J. Geheniau, U. H. Gerlach, R. Geroch, J. Glimm, J. B. Hartle, F. W. Hehl, M. Henneaux, P. A. Hogan, S. Hojman, J. Isenberg, F. Ya. Khalili, A. Kheyfets, K. V. Kuchar, R. Landauer, S. G. Low, V. N. Lukash, B. Mashhoon, R. A. Matzner, J. D. McCrea, A. Mezzacappa, W. A. Miller, Y. Ne'eman, I. D. Novikov, A. Peres, I. Prigogine, I. Robinson, L. S. Schulman, M. O. Scully, D. H. Sharp, L. C. Shepley, A. Y. Shiekh, C. Teitelboim, E. Teller, K. S. Thorne, W. G. Unruh, R. M. Wald, L. Wilets, W. K. Wootters, J. W. York, Jr., and W. H. Zurek. Originally published in 1988. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Quantum physics is the most fundamental -- but also the most baffling -- branch of science. Allowing for dead-and-alive cats, teleportation, antimatter, and parallel universes, as well as underpinning all of our digital technology, it's as important as it is mind-bending. This clear and compact book demystifies the strange and beautiful quantum world, and hence the nature of reality itself. Contents include: Schrodinger's cat, inside the atom, the particle zoo, the Higgs boson, Heisenberg's uncertainty principle, God playing dice, relativity, the Big Bang, dark energy and matter, black holes, the fate of the Universe, the Theory of Everything, quantum gravity, string theory, the multiverse, instant communication, quantum computing and cryptography, superconductivity, quantum biology, quantum consciousness, and much more. Written as a series of mini essays with 200 simple diagrams to help understanding, there can be no easier guide to this notoriously confusing subject. At last it's possible for non-specialists to understand quantum theory and its central role in the birth of the universe and the very existence of life.

Today we are blessed with two extraordinarily successful theories of physics. The first is Albert Einstein's general theory of relativity, which describes the large-scale behaviour of matter in a curved spacetime. This theory is the basis for the standard model of big bang cosmology. The discovery of gravitational waves at the LIGO observatory in the US (and then Virgo, in Italy) is only the most recent of this theory's many triumphs. The second is quantum mechanics. This theory describes the properties and behaviour of matter and radiation at their smallest scales. It is the basis for the standard model of particle physics, which builds up all the visible constituents of the universe out of collections of quarks, electrons and force-carrying particles such as photons. The discovery of the Higgs boson at CERN in Geneva is only the most recent of this theory's many triumphs. But, while they are both highly successful, these two structures leave a lot of important questions unanswered. They are also based on two different interpretations of space and time, and are therefore fundamentally incompatible. We have two descriptions but, as far as we know, we've only ever had one universe. What we need is a quantum theory of gravity. Approaches to formulating such a theory have primarily followed two paths. One leads to String Theory, which has for long been fashionable, and about which much has been written. But String Theory has become mired in problems. In this book, Jim Baggott describes "the road less travelled": an approach which takes relativity as its starting point, and leads to a structure called Loop Quantum Gravity. Baggott tells the story through the careers and pioneering work of two of the theory's most prominent contributors, Lee Smolin and Carlo Rovelli. Combining clear discussions of both quantum theory and general relativity, this book offers one of the first efforts to explain the new quantum theory of space and time.