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Quantum generalizations of Bell's inequality

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Even though quantum correlations violate Bell's inequality, they satisfy weaker inequalities of a similar type. Some particular inequalities of this kind are proved here. The more general case of instruments located in different space-time regions is also discussed in some detail.

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Cirel'son, B.S. Quantum generalizations of Bell's inequality. Lett Math Phys 4, 93–100 (1980).

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