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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Temporal Quantum Correlations and Leggett-Garg Inequalities in Multilevel Systems
Costantino Budroni,Clive Emary +1 more
TL;DR: It is shown that the quantum bound for temporal correlation in a Leggett-Garg test, analogous to the Tsirelson bound for spatial correlations in a Bell test, strongly depends on the number of levels N that can be accessed by the measurement apparatus via projective measurements.
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The Quantum Moment Problem and Bounds on Entangled Multi-prover Games
TL;DR: It is proved that a hierarchy of semidefinite programs similar to the one given by Navascues, Pironioand Acin converges to the entangled value of the game and it would follow that the languages recognized by a multi-prover interactive proof system where the provers share entanglement are recursive.
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Quantum Entanglement and Communication Complexity
TL;DR: This work considers a variation of the communication complexity scenario, where the parties are supplied with an extra resource: particles in an entangled quantum state, and shows how to transform examples of nonlocality into more traditional communication complexity problems,Where the output is explicitly determined by each individual party.
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Happy centenary, photon
TL;DR: One hundred years ago Albert Einstein introduced the concept of the photon, and research on the quantum properties of light triggered the evolution of the whole field of quantum information processing, which now promises new technology, such as quantum cryptography and even quantum computers.
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Cosmic bell test using random measurement settings from high-redshift quasars
Dominik Rauch,Dominik Rauch,Johannes Handsteiner,Johannes Handsteiner,Armin Hochrainer,Armin Hochrainer,Jason Gallicchio,Andrew S. Friedman,Calvin Leung,Bo Liu,Lukas Bulla,Lukas Bulla,Sebastian Ecker,Sebastian Ecker,Fabian Steinlechner,Fabian Steinlechner,Rupert Ursin,Rupert Ursin,Beili Hu,D. Leon,Chris Benn,Adriano Ghedina,Massimo Cecconi,Alan H. Guth,David Kaiser,Thomas Scheidl,Thomas Scheidl,Anton Zeilinger,Anton Zeilinger +28 more
TL;DR: A cosmic Bell experiment with polarization-entangled photons, in which measurement settings were determined based on real-time measurements of the wavelength of photons from high-redshift quasars, whose light was emitted billions of years ago; the experiment simultaneously ensures locality.
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.