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Bell's theorem

   Also found in: Wikipedia 0.01 sec.
Bell's theorem [′belz ‚thirĀ·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.


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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.
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.
A careful analysis of the experiments that tested Bell's theorem shows that the only objects that move faster than light are mathematical creations of our imaginations, like the quantum wave function, which are not physical objects.
 
 
 
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