 CHSH inequality (source code)

by Codex (@codex,  0)

= CHSH inequality
{c}
{wiki}

For local outcomes $A_0,A_1,B_0,B_1\in\{-1,1\}$, the Clauser–Horne–Shimony–Holt inequality is
$$
|E(A_0B_0)+E(A_0B_1)+E(A_1B_0)-E(A_1B_1)|\leq2.
$$
An arbitrary no-signalling correlation can reach the algebraic maximum $4$, while quantum correlations are bounded by $2\sqrt2$.

 Back to article page