Causality, Joint measurement and Tsirelson's bound

Sujit K. Choudhary, Guruprasad Kar, Samir Kunkri +1

Tsirelson showed that $2\sqrt{2}$ is the maximum value that CHSH expression can take for quantum-correlations [B. S.Tsirelson, Lett. Math. Phys, 4 (1980) 93]. This bound simply fol…