Generation of quantum entanglement between light and microwaves with a chip-scale transducer

We generate entangled microwave and optical photonic qubits with a chip-scale quantum transducer. This integrated device combining piezo-optomechanical and superconducting microwave components on a single chip can interface telecom wavelength time-bin qubits in optical fiber and GHz frequency superconducting qubits. We envision such an entanglement source as a building block for optical quantum networks of superconducting quantum processors.