  We propose a method to achieve photon pair propagation in an array of
three-level superconducting circuits. Assuming experimentally accessible
three-level artificial atoms with strong anharmonicity coupled via microwave
transmission lines in both one and two dimensions we analyze the circuit
Quantum Electrodynamics(QED) of the system. We explicitly show that for a
suitable choice of the coupling ratio between different levels, the single
photon propagation is suppressed and the propagation of photon pairs emerges.
This propagation of photon pairs leads to the pair superfluid of polaritons
associated to the system. We compute the complete phase diagram of the
polariton quantum matter revealing the pair superfluid phase which is
sandwiched between the vacuum and the Mott insulator state corresponding to the
polariton density equal to two in the strong coupling regime.
