  Networking superconducting quantum computers is a longstanding challenge in
quantum science. The typical approach has been to cascade transducers:
converting to optical frequencies at the transmitter and to microwave
frequencies at the receiver. However, the small microwave-optical coupling and
added noise have proven formidable obstacles. Instead, we propose optical
networking via heralding end-to-end entanglement with one detected photon and
teleportation. In contrast to cascaded direct transduction, our scheme absorbs
the low optical-microwave coupling efficiency into the heralding step, thus
breaking the rate-fidelity trade-off. Moreover, this technique unifies and
simplifies entanglement generation between superconducting devices and other
physical modalities in quantum networks.
