Bell's theorem


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Bell's theorem

[′belz ‚thir·əm]
(quantum mechanics)
A theorem which states that any hidden variable that satisifies the condition of locality cannot possibly reproduce all the statistical predictions of quantum mechanics, and which places upper limits, for the predictions of any such theory, on the strength of correlations between measurements of spatially separated objects, whereas quantum mechanics predicts very strong correlations between such measurements.
References in periodicals archive ?
And he revealed he was interested in quantum mechanics after becoming inspired by Belfast scientist John Bell's Theorem.
Among her topics are a disproof of Bell's theorem by Clifford algebra valued local variables, failure of the theorem and the local causality of the entangled photons, what sets the upper bound on quantum correlations, restoring local causality and objective reality to the entangled photons, and refutation of some arguments against the disproof.
The article makes it plain that researchers now need to consider the implication of Bell's theorem of non-locality, which indicates that quantum "particles," such as the electrons and atoms in molecules, do not even need to be close to each other, provided they have been previously quantum entangled.
Their book offers yet another popular account of the 'quantum enigma', in all its various guises: covering Bell's Theorem, the EPR 'paradox', the nature of superpositions, the two-slit experiment and so on, all nicely leavened with the usual 'history-lite' and some cute pseudo-Galilean dialogues to help explain what's going on.
It is generally accepted that Bell's theorem [1] is quite exact to describe the linear hidden-variable interpretation of quantum measurement, and hence "quantum reality".
On the theoretical side, we have, as an outgrowth of Bell's theorem, the constantly improving classification of entangled states, and the development of measures of entropy and information content of such states; GHZ states, Shor's algorithm, various sorting techniques, and error-correcting codes.
Deep interconnectedness" demonstrated by Bell's Theorem embraces the interconnectedness of everything unbounded by space and time.
According to Dossey, nonlocality is supported by physics, specifically John Stewart Bell's theorem.
Quantum Theory and the Physicist's Conception of Nature: Philosophical Implications of Bell's Theorem.
Similarly, the interpretation of quantum mechanics to which Einstein objected, and Bohm sought to replace, still reigns supreme after being subjected to a similar period of rigorous experimental testing--including the tests of Bell's theorem.
The new edition will be completely updated and include new material on Bell's Theorem and Dirac's relativistic equation.
SCIENCE got more street cred yesterday when a sign for Bell's Theorem Crescent appeared in Belfast's Titanic Quarter.