MANY WORLDS EVERETT QUANTUM THEORY REALITY

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Many Worlds

Author : Simon Saunders
ISBN : 9780191614118
Genre : Philosophy
File Size : 80.74 MB
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What does realism about the quantum state imply? What follows when quantum theory is applied without restriction, if need be, to the whole universe? These are the questions which an illustrious team of philosophers and physicists debate in this volume. All the contributors are agreed on realism, and on the need, or the aspiration, for a theory that unites micro- and macroworlds, at least in principle. But the further claim argued by some is that if you allow the Schrödinger equation unrestricted application, supposing the quantum state to be something physically real, then this universe is one of countlessly many others, constantly branching in time, all of which are real. The result is the many worlds theory, also known as the Everett interpretation of quantum mechanics. The contrary claim sees this picture of many worlds as in no sense inherent in quantum mechanics, even when the latter is allowed unrestricted scope and even given that the quantum state itself is something physically real. For this picture of branching worlds fails to make physical sense, let alone common sense, even on its own terms. The status of these worlds, what they are made of, is never adequately explained. Ordinary ideas about time and identity over time become hopelessly compromised. The concept of probability itself is brought into question. This picture of many branching worlds is inchoate, it is a vision, an error. There are realist alternatives to many worlds, some even that preserve the Schrödinger equation unchanged. Twenty specially written essays, accompanied by commentaries and discussions, examine these claims and counterclaims in depth. They focus first on the question of ontology, the existence of worlds (Part 1 and 2), second on the interpretation of probability (Parts 3 and 4), and third on alternatives or additions to many worlds (Parts 5 and 6). The introduction offers a helpful guide to the arguments for the Everett interpretation, particularly as they have been formulated in the last two decades.
Category: Philosophy

Quantenrealit T

Author : HERBERT
ISBN : 9783034866811
Genre : Juvenile Nonfiction
File Size : 79.20 MB
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Category: Juvenile Nonfiction

The Many Worlds Of Hugh Everett Iii

Author : Peter Byrne
ISBN : 9780191655227
Genre : Science
File Size : 80.89 MB
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Peter Byrne tells the story of Hugh Everett III (1930-1982), whose "many worlds" theory of multiple universes has had a profound impact on physics and philosophy. Using Everett's unpublished papers (recently discovered in his son's basement) and dozens of interviews with his friends, colleagues, and surviving family members, Byrne paints, for the general reader, a detailed portrait of the genius who invented an astonishing way of describing our complex universe from the inside. Everett's mathematical model (called the "universal wave function") treats all possible events as "equally real", and concludes that countless copies of every person and thing exist in all possible configurations spread over an infinity of universes: many worlds. Afflicted by depression and addictions, Everett strove to bring rational order to the professional realms in which he played historically significant roles. In addition to his famous interpretation of quantum mechanics, Everett wrote a classic paper in game theory; created computer algorithms that revolutionized military operations research; and performed pioneering work in artificial intelligence for top secret government projects. He wrote the original software for targeting cities in a nuclear hot war; and he was one of the first scientists to recognize the danger of nuclear winter. As a Cold Warrior, he designed logical systems that modeled "rational" human and machine behaviors, and yet he was largely oblivious to the emotional damage his irrational personal behavior inflicted upon his family, lovers, and business partners. He died young, but left behind a fascinating record of his life, including correspondence with such philosophically inclined physicists as Niels Bohr, Norbert Wiener, and John Wheeler. These remarkable letters illuminate the long and often bitter struggle to explain the paradox of measurement at the heart of quantum physics. In recent years, Everett's solution to this mysterious problem - the existence of a universe of universes - has gained considerable traction in scientific circles, not as science fiction, but as an explanation of physical reality.
Category: Science

Die Verborgene Wirklichkeit

Author : Brian Greene
ISBN : 9783641082079
Genre : Science
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Wir sind nicht allein! - Brian Greene über unsere Doppelgänger im All In seinem neuen Buch macht sich Physiker und Bestsellerautor Brian Greene auf die Suche nach der »verborgenen Wirklichkeit« im Universum. Er zeigt, warum vieles dafür spricht, dass wir in den Weiten des Kosmos nicht allein sind, und er beschreibt, welchen Parallelwelten die Astrophysiker auf der Spur sind. Wie keinem Zweiten gelingt es ihm dabei, physikalische Spitzenforschung mit hohem Unterhaltungswert zu verbinden.
Category: Science

Consciousness And Quantum Mechanics

Author : Michael B. Mensky
ISBN : 9789814291422
Genre : Science
File Size : 53.61 MB
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The phenomenon of consciousness includes mysterious aspects providing a basis for many spiritual doctrines (including religions) and psychological practices. These directions of human knowledge are usually considered to contradict the laws of science. However, quantum mechanics ? in a sense, the mysterious direction of science ? allows us to include the phenomena of consciousness and life as well as the relevant phenomena in the sphere of science.Wolfgang Pauli, one of the pioneers of quantum mechanics, together with great psychologist Carl Gustav Jung, guessed about the relation between quantum mechanics and consciousness in the beginning of the twentieth century. However, only ?many-worlds? interpretation of quantum mechanics, proposed in 1957 by Hugh Everett III, gave the real basis for the systematic investigation of this relation.Roger Penrose, one of the apologists of the relation between quantum mechanics and consciousness, claimed in his Last book ?The Road to Reality? that the Everett's interpretation may be estimated only after creating the theory of consciousness. Thereagainst, the author has proposed in 2000 and further elaborates in this book, the so-called Extended Everett's Concept, that allows one to derive the main features of consciousness and super-consciousness (intuition, or direct vision of truth) from quantum mechanics. This is exposed in this book in a form intelligible for a wide audience.
Category: Science

The Many Worlds Interpretation Of Quantum Mechanics

Author : Bryce Seligman Dewitt
ISBN : 9781400868056
Genre : Science
File Size : 69.49 MB
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A novel interpretation of quantum mechanics, first proposed in brief form by Hugh Everett in 1957, forms the nucleus around which this book has developed. In his interpretation, Dr. Everett denies the existence of a separate classical realm and asserts the propriety of considering a state vector for the whole universe. Because this state vector never collapses, reality as a whole is rigorously deterministic. This reality, which is described jointly by the dynamical variables and the state vector, is not the reality customarily perceived; rather, it is a reality composed of many worlds. By virtue of the temporal development of the dynamical variables, the state vector decomposes naturally into orthogonal vectors, reflecting a continual splitting of the universe into a multitude of mutually unobservable but equally real worlds, in each of which every good measurement has yielded a definite result, and in most of which the familiar statistical quantum laws hold. The volume contains Dr. Everett's short paper from 1957, "'Relative State' Formulation of Quantum Mechanics," and a far longer exposition of his interpretation, entitled "The Theory of the Universal Wave Function," never before published. In addition, other papers by Wheeler, DeWitt, Graham, and Cooper and Van Vechten provide further discussion of the same theme. Together, they constitute virtually the entire world output of scholarly commentary on the Everett interpretation. Originally published in 1973. 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.
Category: Science

The Emergent Multiverse

Author : David Wallace
ISBN : 9780199546961
Genre : Philosophy
File Size : 40.22 MB
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The Emergent Multiverse presents a striking and influential new account of the 'many worlds' approach to quantum theory. The point of science, it is generally accepted, is to tell us how the world works and what it is like. But quantum theory seems to fail to do this: taken literally as a theory of the world, it seems to make crazy claims: particles are in two places at once; cats are alive and dead at the same time. The Everett interpretation of quantummechanics takes the apparent craziness seriously, and asks, 'what would it be like if particles really were in two places at once, if cats really were alive and dead at the same time'? The answer, it turns out,is that if the world were like that it would be constantly branching into copies--or 'many worlds'. This idea is not sensationalist: it simply takes quantum theory seriously, literally, as a description of the world, and is now accepted by many physicists as the best way to make coherent sense of quantum theory. David Wallace brings the reader up to date with recent discussion of the Everett interpretation in physics and in philosophy of science; at the same time, he provides a self-containedand thoroughly modern account of the Everett interpretation.
Category: Philosophy

Foundations Of Quantum Mechanics

Author : Travis Norsen
ISBN : 9783319658674
Genre : Science
File Size : 48.85 MB
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Authored by an acclaimed teacher of quantum physics and philosophy, this textbook pays special attention to the aspects that many courses sweep under the carpet. Traditional courses in quantum mechanics teach students how to use the quantum formalism to make calculations. But even the best students - indeed, especially the best students - emerge rather confused about what, exactly, the theory says is going on, physically, in microscopic systems. This supplementary textbook is designed to help such students understand that they are not alone in their confusions (luminaries such as Albert Einstein, Erwin Schroedinger, and John Stewart Bell having shared them), to sharpen their understanding of the most important difficulties associated with interpreting quantum theory in a realistic manner, and to introduce them to the most promising attempts to formulate the theory in a way that is physically clear and coherent. The text is accessible to students with at least one semester of prior exposure to quantum (or "modern") physics and includes over a hundred engaging end-of-chapter "Projects" that make the book suitable for either a traditional classroom or for self-study.
Category: Science

Kosmische Doppelg Nger Wie Es Zum Urknall Kam Wie Unz Hlige Universen Entstehen

Author : Alex Vilenkin
ISBN : 3827426871
Genre : Science
File Size : 52.23 MB
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Alex Vilenkin ist einer der kreativsten und angesehensten Kosmologen unserer Zeit. Er wendet sich mit diesem Buch erstmals an ein breites Publikum. Mit Humor und unterhaltsamen Anekdoten aus dem 'Kosmologen-Alltag' beschreibt er leicht verständlich das faszinierende Weltbild der modernen Kosmologie. Zunächst erklärt er die Urknall-Theorie und ihre Erweiterung durch das Szenario der Kosmischen Inflation. Dann führt er den Leser an die vorderste Forschungsfront und macht ihn auf spannende Weise mit den neuesten Ideen der Kosmologen vertraut – viele stammen von Vilenkin selbst. Er beschreibt, wie es zum Urknall kam und warum ständig neue Universen entstehen. Eine der erstaunlichsten Aussagen seiner Theorie ist, dass es Regionen im Kosmos geben muss, unendlich viele sogar, die mit unserer identisch sind – Welten mit exakten Doppelgängern von uns! Wir müssen uns deshalb endgültig von der Vorstellung unserer Einzigartigkeit verabschieden. Und das Anthropische Prinzip – wonach die physikalischen Eigenschaften unseres Universums scheinbar genau die Werte haben, die für die Evolution von Lebewesen nötig sind – bekommt eine neue Deutung durch Vilenkins Prinzip der Mittelmäßigkeit. Wer sich für die großen naturwissenschaftlichen und philosophischen Fragen zum Kosmos und der Stellung des Menschen darin interessiert, wird in diesem mit Bildern und Cartoons reich illustrierten Buch viele verblüffende Antworten finden. Stimmen zur gebundenen Ausgabe: " [...] Kosmische Doppelgänger [ist] eines der besten populärwissenschaftlichen Bücher überhaupt. Es ist fachkundig und gut geschrieben, strukturiert und übersichtlich, unterhaltsam, verständlich und informativ. Es behandelt die großen Fragen zum Kosmos auf eine Weise, die jeder interessierte Laie nachvollziehen kann." Spektrum der Wissenschaft, September 2008
Category: Science