Generating microwave entanglement for quantum network

Connecting distant quantum processor is a desirable goal in quantum communication community, termed quantum network. A promising candidate is the platform of superconducting processors connected by optical photons. In this project, by driving quantum transducers in the parametric down conversion mode, we investigate the generation of distant entangled microwave photons by heralding optical mode detection. The entanglement is studied in both discrete and continuous variables based on hybrid systems, e.g., piezo-optomechanics, electro-optics. We show that the entanglement generated can help establishe a quantum channel with positive capacity which can be used to transmit quantum information, and thus is a promising way to connect distant quantum processors in the near term.