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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A Quantum Delayed-Choice Experiment
TL;DR: Strong nonlocal correlations are observed, which show that the photon must simultaneously behave both as a particle and as a wave.
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Violating Bell's inequalities in vacuum
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Joint Measurability, Einstein-Podolsky-Rosen Steering, and Bell Nonlocality
TL;DR: It is shown that a set of measurements is not jointly measurable if and only if it can be used for demonstrating Einstein-Podolsky-Rosen steering, a form of quantum nonlocality, and shown that it does not violate a large class of Bell inequalities.
Quantum Computational Complexity
TL;DR: A survey of quantum computational complexity, with a focus on three fundamental notions: polynomial-time quantum computations, the efficient verification of quantum proofs, and quantum interactive proof systems, is presented in this article.
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On-demand semiconductor source of entangled photons which simultaneously has high fidelity, efficiency, and indistinguishability
Hui Wang,Hai Hu,Tung-Hsun Chung,Jian Qin,Xiaoxia Yang,Jun Li,Run-Ze Liu,Han-Sen Zhong,Yu-Ming He,Xing Ding,Yu-Hao Deng,Qing Dai,Yongheng Huo,Sven Höfling,Sven Höfling,Sven Höfling,Chao-Yang Lu,Jian-Wei Pan +17 more
TL;DR: This work generates entangled photon pairs with a state fidelity of 0.90(1), pair generation rate, pair extraction efficiency, and photon indistinguishability simultaneously, and will open up many applications in high-efficiency multiphoton experiments and solid-state quantum repeaters.
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.