Greenberger-Horne-Zeilinger nonlocality in phase space - art. no. 022106

We show that the continuous-variable analogues to the multipartite entangle d Greenberger-Horne-Zeilinger states of qubits violate Bell-type inequaliti es imposed by local realistic theories. Our results suggest that the degree of nonlocality of these nonmaximally entangled continuous-variable states, represented by the maximum violation, grows with increasing number of part ies. This growth does not appear to be exponentially large as for the maxim ally entangled qubit states, but rather decreases for larger numbers of par ties.