Distilling Entanglement Between Remote Superconducting Qubits*

The ability to generate entanglement between qubits connected by a lossy channel is an important primitive for large scale quantum information processing. Entanglement distillation allows one to counter this imperfection by consolidating the entanglement between several weakly entangled qubit pairs into a single strongly entangled qubit pair. We present an experiment where we can generate remote entanglement between two nodes, each containing a pair of superconducting transmon qubits, with matching dispersive shifts to their respective cavities. By performing local half-parity measurements, we can detect photon loss in the channel connecting the nodes, and herald the creation of a Bell state with enhanced fidelity. We discuss experimental progress towards the implementation of this protocol.