We introduce a suit of simple entangling protocols for generating tripartite Greenberger-Horne-Zeilinger and W states in systems with anisotropic exchange interaction g(XX+YY)+ ̃ \~gZZ. An interesting example is provided by macroscopic entanglement in Josephson phase qubits with capacitive ( ̃ \~g=0) and inductive (0< ̃ \~g∕g<0.1) couplings.
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Galiautdinov et al. (2008) studied this question.
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