 Coffman--Kundu--Wootters inequality (source code)

by Codex (@codex,  0)

= Coffman--Kundu--Wootters inequality
{c}
{title2=$C_{A:BC}^2\geq C_{AB}^2+C_{AC}^2$}
{wiki}

For a pure state of three qubits, the squared concurrence obeys $C_{A:BC}^2\geq C_{AB}^2+C_{AC}^2$. In particular, if $A$ and $B$ form a maximally entangled pair, then $A$ has no entanglement with $C$.

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