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arXiv:1804.07308 · Nature

Quantum control of surface acoustic-wave phonons

Kevin J. Satzinger, Y. P. Zhong, H.-S. Chang, G. A. Peairs, Audrey Bienfait, Ming-Han Chou, Agnetta Y. Cleland, C. R. Conner, Étienne Dumur, J. Grebel, I. Gutierrez, B. H. November, R. G. Povey, S. J. Whiteley, D. D. Awschalom, David Schuster, Agnetta Y. Cleland

Published Nov 1, 2018• 423 citations
arXivHTMLPDF
DOI
10.1038/s41586-018-0719-5

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Surface acoustic wave (SAW) phonon coupling with nitrogen-vacancy (NV) center spins in diamond offers a promising platform for on-chip quantum phononic manipulations. Although an ensemble of NV centers coupled to a common SAW phonon mode enables superradiance and collective quantum control, achieving a tunable superradiant phase transition remains challenging. Here, we show that optically driving NV centers level transitions enhances the effective spin-phonon coupling, triggering a SAW phonon superradiant phase transition in the weak-coupling regime. We also demonstrate that above a critical threshold, the driving light rapidly switches on the phonon superradiance--a dynamic effect that persists in finite-number NV ensembles. Our results provide a controllable route to coherent phonon-NV spin manipulation in solid state quantum devices.