Mermin inequalities for perfect correlations
Adán Cabello, Otfried Gühne, David Rodríguez · Physical Review A · 2008
Any $n$-qubit state with $n$ independent perfect correlations is equivalent to a graph state. We present the optimal Bell inequalities for perfect correlations and maximal violation for all classes of graph states with $n\ensuremath{\le}6$ qubits. Twelve of them were previously unknown and four give the same violation as the Greenberger-Horne-Zeilinger state, although the corresponding states are more resistant to decoherence.