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arXiv · 2403.10989

Coherent Acoustic Control of Defect Orbital States in the Strong-Driving Limit

B. A. McCullian·V. Sharma·H. Y. Chen·J. C. Crossman·E. J. Mueller·G. D. Fuchs
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Abstract

We use a bulk acoustic wave resonator to demonstrate coherent control of the excited orbital states in a diamond nitrogen-vacancy (NV) center at cryogenic temperature. Coherent quantum control is an essential tool for understanding and mitigating decoherence. Moreover, characterizing and controlling orbital states is a central challenge for quantum networking, where optical coherence is tied to orbital coherence. We study resonant multi-phonon orbital Rabi oscillations in both the frequency and time domain, extracting the strength of the orbital-phonon interactions and the coherence of the acoustically driven orbital states. We reach the strong-driving limit, where the physics is dominated by the coupling induced by the acoustic waves. We find agreement between our measurements, quantum master equation simulations, and a Landau-Zener transition model in the strong-driving limit. Using perturbation theory, we derive an expression for the orbital Rabi frequency versus acoustic drive strength that is non-perturbative in the drive strength and agrees well with our measurements for all acoustic powers. Motivated by continuous wave spin resonance-based decoherence protection schemes, we model the orbital decoherence and find good agreement between our model and our measured few-to-several nanoseconds orbital decoherence times. We discuss the outlook for orbital decoherence protection.

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B. A. McCullian, V. Sharma, H. Y. Chen, J. C. Crossman, E. J. Mueller, G. D. Fuchs. 2024-03-16. Coherent Acoustic Control of Defect Orbital States in the Strong-Driving Limit. https://arxiv.org/abs/2403.10989

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