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Lettere al nuovo cimento della societa italiana di fisica/Lettere al nuovo cimento

Example of a macroscopical classical situation that violates Bell inequalities

Diederik Aerts

Published May 1, 1982• 60 citations
Publisher
DOI
10.1007/bf02817207

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We present a macroscopical mechanistic classical laboratory situation, and a classical macroscopical entity, and coincidence measurements on this entity, that lead to a violation of the Bell inequalities corresponding to these coincidence measurements. The violation that we obtain with these coincidence measurements is exactly the same as the violation of the Bell inequalities by the well known coincidence measurements of the quantum entity of two spin 1/2 particles in a singlet spin state. With this we mean that it gives rise to the same numerical values for the expectation values and the same numerical value 2•√2 for the expression used in the Bell inequalities.
We have recently presented a general scheme enabling quantum modeling of different types of situations that violate Bell's inequalities [1]. In this paper, we specify this scheme for a combination of two concepts. We work out a quantum Hilbert space model where 'entangled measurements' occur in addition to the expected 'entanglement between the component concepts', or 'state entanglement'. We extend this result to a macroscopic physical entity, the 'connected vessels of water', which maximally violates Bell's inequalities. We enlighten the structural and conceptual analogies between the cognitive and physical situations which are both examples of a nonlocal non-marginal box modeling in our classification.