On the Einstein-Podolsky-Rosen paradox
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In this article, it was shown that even without such a separability or locality requirement, no hidden variable interpretation of quantum mechanics is possible and that such an interpretation has a grossly nonlocal structure, which is characteristic of any such theory which reproduces exactly the quantum mechanical predictions.Abstract:
THE paradox of Einstein, Podolsky and Rosen [1] was advanced as an argument that quantum mechanics could not be a complete theory but should be supplemented by additional variables These additional variables were to restore to the theory causality and locality [2] In this note that idea will be formulated mathematically and shown to be incompatible with the statistical predictions of quantum mechanics It is the requirement of locality, or more precisely that the result of a measurement on one system be unaffected by operations on a distant system with which it has interacted in the past, that creates the essential difficulty There have been attempts [3] to show that even without such a separability or locality requirement no "hidden variable" interpretation of quantum mechanics is possible These attempts have been examined elsewhere [4] and found wanting Moreover, a hidden variable interpretation of elementary quantum theory [5] has been explicitly constructed That particular interpretation has indeed a grossly nonlocal structure This is characteristic, according to the result to be proved here, of any such theory which reproduces exactly the quantum mechanical predictionsread more
Citations
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Collective tests for quantum nonlocality.
TL;DR: Pairs of spin-1/2 particles are prepared in a Werner state (namely, a mixture of singlet and random components); if the random component is large enough, the statistical results of spin measurements that may be performed on each pair separately can be reproduced by an algorithm involving local ``hidden'' variables.
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Direct Bell states generation on a III-V semiconductor chip at room temperature.
Adeline Orieux,Andreas Eckstein,Aristide Lemaître,P. Filloux,Ivan Favero,Giuseppe Leo,Thomas Coudreau,Arne Keller,Pérola Milman,Sara Ducci +9 more
TL;DR: In this paper, the authors demonstrate the direct generation of polarization-entangled photon pairs at room temperature and telecom wavelength in an AlGaAs semiconductor waveguide, based on spontaneous parametric down-conversion with a counter-propagating phase-matching scheme.
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Quantum Cryptography
TL;DR: The theory of quantum cryptography, its potential relevance and the development of a prototype system at Los Alamos, which utilises the phenomenon of single-photon interference to perform quantum cryptography over an optical fiber communications link are described.
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John S. Bell’s concept of local causality
TL;DR: In this paper, the authors use the relativistic local causality on which Bell's theorem rests to derive an empirically testable Bell-type inequality and to recapitulate the EPR argument.
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Photon-photon entanglement with a single trapped atom.
Bernhard Weber,Holger P. Specht,Tobias Müller,Jörg Bochmann,Martin Mücke,David Moehring,Gerhard Rempe +6 more
TL;DR: The combination of cavity-QED and trapped atom techniques makes the protocol inherently deterministic--an essential step for the generation of scalable entanglement between the nodes of a distributed quantum network.
References
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Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
TL;DR: Consideration of the problem of making predictions concerning a system on the basis of measurements made on another system that had previously interacted with it leads to the result that one is led to conclude that the description of reality as given by a wave function is not complete.
Journal ArticleDOI
Discussion of Experimental Proof for the Paradox of Einstein, Rosen, and Podolsky
D. Bohm,Yakir Aharonov +1 more
TL;DR: A brief review of the physical significance of the paradox of Einstein, Rosen, and Podolsky is given, and it is shown that it involves a kind of correlation of the properties of distant noninteracting systems, which is quite different from previously known kinds of correlation as discussed by the authors.