Bell-CHSH inequality and unitary operators

2024/03/22 by Guimaraes, M. S., Roditi, I., Sorella, S. P.
#FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2403.15276

Abstract

Unitary operators are employed to investigate the violation of the Bell-CHSH inequality. The ensuing modifications affecting both classical and quantum bounds are elucidated. The relevance of a particular class of unitary operators whose expectation values are real is pointed out. For these operators, the classical and quantum bounds remain unaltered, being given, respectively, by 2 and 2√(2). As an example, the Weyl unitary operators for a real scalar field in relativistic Quantum Field Theory are discussed.

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