5 problems

Bell-pair superadditivity conjecture. There is an experiment on pairs of Bell singlets, of the $2\times4\times4$ type, more than twice as strong as CHSH, and involving joint measur…

Optimal 2×2×3 strength conjecture. The strongest possible $2\times2\times3$ nonlocality proof has statistical strength $0.077$, and it uses the bipartite state

CHSH optimality conjecture. The best experiment with the Bell singlet state is the CHSH experiment.

GHZ optimality conjecture. Among all $3\times2\times2$ proofs, and allowing correlated setting distributions, GHZ is best.

CHSH optimality conjecture. Among all $2\times2\times2$ proofs, and allowing correlated setting distributions, CHSH is best.