We introduce a hybrid tripartite quantum system for strong coupling between a semiconductor spin, a mechanical phonon, and a microwave photon. Consisting of a piezoelectric resonator with an integrated diamond strain concentrator, this system achieves microwave-acoustic and spin-acoustic coupling rates ∼MHz or greater, allowing for simultaneous ultra-high cooperativities (∼103 and ∼102, respectively). From finite-element modeling and master equation simulations, we estimate photon-to-spin quantum state transfer fidelities exceeding 0.97 based on separately demonstrated device parameters. We anticipate that this device will enable hybrid quantum architectures that leverage the advantages of both superconducting circuits and solid-state spins for information processing, memory, and networking.
@article{arxiv.2202.11291,
title = {Spin-Phonon-Photon Strong Coupling in a Piezomechanical Nanocavity},
author = {Hamza Raniwala and Stefan Krastanov and Lisa Hackett and Matt Eichenfield and Dirk R. Englund and Matthew E. Trusheim},
journal= {arXiv preprint arXiv:2202.11291},
year = {2022}
}