Stabilization of entanglement between remote transmon qubits

Entanglement between remote qubits can be a valuable resource for scalable quantum computation and other quantum technologies. Here, we discuss non-unitary methods for generating and stabilizing such entanglement between remote superconducting qubits. While joint measurement of the qubits using a sequential probe allows for post-selected entanglement, adding feedback during the measurement conditioned on the outcome allows for deterministic entanglement. This can be supplemented or substituted for with reservoir engineering techniques, which allow for non-zero concurrence in the steady state even in the presence of dephasing. Both the dispersive and near-resonant regimes of circuit QED are analysed.