Bell’s theorem is a fundamental result in quantum mechanics: it discriminates between quantum mechanics and all theories where probabilities in measurement results arise from the ignorance of pre-existing local properties. We give an extremely simple proof of Bell's inequality; a single figure suffices. This simplicity may be useful in the unending debate over what exactly the Bell inequality means, because the hypotheses underlying the proof become transparent. It is also a useful didactic tool, as the Bell inequality can be explained in a single intuitive lecture.
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PAPERS| November 01 2013
A simple proof of Bell's inequality
Lorenzo Maccone; A simple proof of Bell's inequality. Am. J. Phys. 1 November 2013; 81 (11): 854–859. https://doi.org/10.1119/1.4823600
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