WORLD SCIENTIFIC eBooks

International conference on Bell's theorem and the foundations of modern physics, Palazzo del Ridotto, Cesena, Italy, 7-10 October 1991

J. S. Bell, Alwyn van der Merwe, F. Selleri, Gino Tarozzi

Published Jan 1, 1992• 3 citations

Abstract

John Stewart Bell and the debate on the significance of his contributions to the foundations of quantum mechanics, M.Jammer John Bell as a deep critical testimony of modern physics, V. de Alfaro magic moments with John Bell, R. Bertlmann what if Bell had come before Copenhagen?, J. Cushing quantum mechanics vs. realism in the context of two-state oscillations, D. Home one or two bell theorems?, B. Despagnat self interference of two photons, J. Rarity polarization correlation analysis of the simultaneous two-photon emission of metastable hydrogen, H. Kleinpoppen unneeded use of Bell inequalities conceals the physics in the EPR subject, O. Piccioni Bell's other theorem and its connection with nonlocality - Part 1 H. Brown Bell's other theorem and its connection with nonlocality - Part 2 A. Elby historical reflections on the notion of an objective reality, P .Feyerabend interference, indistinguishability and nonlocality, L. Mandel quantum physics from the viewpoint of realism, F. Selleri (Part contents).

Related papers

The Foundations of quantum mechanics : historical analysis and open questions, Lecce, Italy 13-16 October 1998

Open Question, Claudio Garola, Arcangelo Rossi

Kaons and Bell's inequality, A. Afriat an outline of an interpretation of quantum mechanics, G. Auletta classical limit - localization induced by noise, P. Blanchard et al quantum mechanics - the real and the possible, G. Boscarino on the decoherence of a free semiclassical positronium, B. Carazza quantum mechanics without waves, M. Cini natural kinds and concepts of physics, V. Fano is quantum mechanics contextual? C. Garola the evolution of the concept of correlation function in the researches on Einstein locality, A. Garuccio objective quantum description of macroscopic system, L. Lanz Bell inequalities and correlation experiments - a purely particle statistical investigation, M. Minozzo random path interpretation of quantum mechanics, M. Roncadelli information and state correlations from classical to quantum physics - the foundations issue, A. Rossi physical meaning of Bell type inequalities, F. Selleri. (Part contents)

WORLD SCIENTIFIC eBooksJan 1, 20000 citations

A Critical Analysis of the Quantum Nonlocality Problem

Justo Pastor Lambare

The alleged nonlocal character of quantum mechanics is inextricably related to the formulation of the Bell theorem. However, as we shall see, that relation is commonly incorrectly assessed. The departure from the clear line of reasoning that John Bell tried to convey has led to a polarization of part of the scientific community into radical irreconcilable positions. We show how the correct appreciation of Bell's work calls for reinterpreting the usual significance given to the Bell theorem yielding a more rational perspective of the problem. Given the relevance of the Bell-type inequalities in quantum information technology and quantum foundations, further clarification of their relation to the nonlocality conundrum deserves due attention. The exposition is also of didactic value. It shows the problems arising from incorrect inferences and superfluous metaphysical ideas.

Jul 11, 20220 citations

Quantum Nonlocality and Reality

Mary Bell, Shan 1970 or 1971- Gao

Combining twenty-six original essays written by an impressive line-up of distinguished physicists and philosophers of physics, this anthology reflects some of the latest thoughts by leading experts on the influence of Bell's theorem on quantum physics. Essays progress from John Bell's character and background, through studies of his main work, and on to more speculative ideas, addressing the controversies surrounding the theorem, and investigating the theorem's meaning and its deep implications for the nature of physical reality. Combined, they present a powerful comment on the undeniable significance of Bell's theorem for the development of ideas in quantum physics over the past 50 years. Questions surrounding the assumptions and significance of Bell's work still inspire discussion in the field of quantum physics. Adding to this with a theoretical and philosophical perspective, this balanced anthology is an indispensable volume for students and researchers interested in the philosophy of physics and the foundations of quantum mechanics.

Cambridge University Press eBooksAug 31, 201679 citations

A Critical Analysis of the Quantum Nonlocality Problem

Justo Pastor Lambare

The alleged nonlocal character of quantum mechanics is inextricably related to the formulation of the Bell theorem. However, as we shall see, that relation is commonly incorrectly assessed. The departure from the clear line of reasoning that John Bell tried to convey has led to a polarization of part of the scientific community into radical irreconcilable positions. We show how the correct appreciation of Bell's work calls for reinterpreting the usual significance given to the Bell theorem yielding a more rational perspective of the problem. Given the present relevance of the Bell-type inequalities in quantum information technology and quantum foundations, further clarification of their relation to the nonlocality conundrum deserves due attention. The exposition is also of didactic value. It shows the problems arising from incorrect inferences and superfluous metaphysical ideas.

May 5, 20221 citation

John Bell and the nature of the quantum world

Reinhold A. Bertlmann

I present my encounter with John Bell at CERN, our collaboration and joint work in particle physics. I also will recall our quantum debates and give my personal view on Bell's fundamental work on quantum theory, in particular, on contextuality and nonlocality of quantum physics. Some mathematical and geometric aspects of entanglement are discussed as influence of Bell's Theorem. Finally, I make some historical comments on the experimental side of Bell inequalities.

arXiv:1411.5322Journal of Physics A Mathematical and TheoreticalOct 9, 201444 citations

John Bell and Bell's Theorem

Sheldon Goldstein, Roderich Tumulka, Nino Zangh�

John Stewart Bell (1928-1990), a truly deep and serious thinker, was one of the leading physi-cists of the 20th century. He became famous for his discovery that quantum mechanics impliesthat nature is nonlocal, i.e., that there are physical inuences between events that propagatefaster than light.From 1960 until his death Bell worked at CERN in Geneva on the physics of particle accel-erators, making a number of important contributions to high-energy physics and quantum eldtheory. Noteworthy was his discovery in 1969, together with Roman Jackiw, of the so-called\Bell-Jackiw-Adler anomaly (discovered independently by Stephen Adler), a mechanism ex-plaining physical e ects such as neutral pion decay (which are unexplainable on the basis of thesymmetries of the classical eld Lagrangian), in terms of an \anomalous term arising from therenormalization of quantum eld theory. Since then this mechanism has become an importantcornerstone of quantum eld theory. Another important contribution was the argument he gavein 1967 for why weak interactions should be described using a gauge theory.John Bell was one of the leading experts|perhaps the leading expert|on the foundations ofquantum mechanics. The book collecting his articles on this subject, Speakable and unspeakablein quantum mechanics, is unsurpassed for clarity and depth and it is still the best reference forwhoever wishes to learn about the eld [4].Bell strongly opposed the \Copenhagen interpretation of quantum physics, according towhich macroscopic objects, such as chairs and planets, do exist out there, but electrons andother microscopic particles do not. According to the Copenhagen view, the world is divided intotwo realms, macro and micro, \classical and \quantum, logical and contradictory|or, as Bellput it in one of his essays, into \speakable and \unspeakable. Along with Albert Einstein,Erwin Schrodinger, Louis de Broglie and !David Bohm, Bell was one of the few physicistscompelled by his conscience to reject the Copenhagen interpretation.Bell emphasized that the empirical facts of quantum physics do not at all force us to renouncerealism. There is, in fact, a realist theory (!Bohmian mechanics, also known as the de Broglie-Bohm theory) that accounts|insofar as the nonrelativistic theory is concerned|for all of thesefacts in a most elegant way. This theory describes a world in which electrons, quarks andthe like are point particles, always having positions that move in a manner dictated by thewave function. It should be taught to students, Bell insisted, as a legitimate alternative tothe prevailing orthodoxy. After GianCarlo Ghirardi, Alberto Rimini, and Tullio Weber in 1986succeeded in formulating a second kind of realist theory, Bell encouraged the further developmentof this theory as well [4, p. 201]. He thought that such a theory contained the seeds of a1

Jan 1, 20041 citation