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.
@article{arxiv.2012.13408,
title = {Optically-Heralded Entanglement of Superconducting Systems in Quantum Networks},
author = {Stefan Krastanov and Hamza Raniwala and Jeffrey Holzgrafe and Kurt Jacobs and Marko Lončar and Matthew J. Reagor and Dirk R. Englund},
journal= {arXiv preprint arXiv:2012.13408},
year = {2021}
}