A genuine quantum router for microwave photons

A quantum router uses a control qubit to direct the signal qubit to a certain address, which could take a quantum superposition depending on the quantum state of the control qubit. As the elementary building block of a quantum network and a quantum random access memory, the development of a quantum router may accelerate many research fields like quantum entanglement distribution and quantum machine learning. In recent years, many attempts have been made to realize a quantum router in the optical domain. In this talk, I will introduce our experiments of realizing a genuine quantum router in the microwave domain based on superconducting circuit quantum electrodynamics system and demonstrate the coherent routing of a microwave quantum state with high fidelity using a transmon qubit.