Any pair of incompatible rank-one projective measurements is optimal for
some non-trivial Bell inequality
Any pair of incompatible rank-one projective measurements is optimal for
some non-trivial Bell inequality
Bell non-locality represents one of the most striking departures of quantum mechanics from classical physics. It shows that correlations between space-like separated systems allowed by quantum mechanics are stronger than those present in any classical theory. In a recent work [Sci. Adv. 7, eabc3847 (2021)], a family of Bell functionals …