Gisin's Theorem for Three Qubits

Abstract

We present a Theorem that all generalized Greenberger-Horne-Zeilinger states of a three-qubit system violate a Bell inequality in terms of probabilities. All pure entangled states of a three-qubit system are shown to violate a Bell inequality for probabilities; thus, one has Gisin's theorem for three qubits.

5 pages, 2 figures. v2: journal-ref is added and some corrections are made