Maximally entangling tripartite protocols for Josephson phase qubits

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)+(g) over tilde ZZ. An interesting example is provided by macroscopic entanglement in Josephson phase qubits with capacitive ((g) over tilde =0) and inductive (0