Hybrid spin-phonon architecture for scalable solid-state quantum nodes

Abstract Solid-state spins are promising for quantum information processing and networks, but their inhomogeneity hinders scalable control and entanglement. We propose a hybrid spin-phonon architecture based on spin-embedded SiC optomechanical crystal (OMC) cavities, which integrate photonic and phononic channels for multi-spin interactions. Using a Raman-facilitated process, spins strongly couple to the OMC cavity’s zero-point motion at 0.57 MHz, enabling coherent spin-phonon interactions. This interface supports a two-qubit controlled-Z gate with simulated fidelity of 96.80% and efficiently generates entangled Dicke states with over 99% fidelity by leveraging a robust spin-phonon dark state resilient to spectral inhomogeneity and excited-state loss. The platform offers potential scalability and all-to-all connectivity via phonons, along with optical links, enabling both entanglement generation and quantum acoustics studies in the solid state.

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Publication Details

Journal
npj Quantum Information
Published
2025-11-13
DOI
https://doi.org/10.1038/s41534-025-01138-2
Citations
2
Primary Topic
Mechanical and Optical Resonators
Type
article
Field-Weighted Citation Impact
2.49

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Hybrid spin-phonon architecture for scalable solid-state quantum nodes

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npj Quantum Information
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Hybrid spin-phonon architecture for scalable solid-state quantum nodes

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article en
2 citations

Abstract

Abstract Solid-state spins are promising for quantum information processing and networks, but their inhomogeneity hinders scalable control and entanglement. We propose a hybrid spin-phonon architecture based on spin-embedded SiC optomechanical crystal (OMC) cavities, which integrate photonic and phononic channels for multi-spin interactions. Using a Raman-facilitated process, spins strongly couple to the OMC cavity’s zero-point motion at 0.57 MHz, enabling coherent spin-phonon interactions. This interface supports a two-qubit controlled-Z gate with simulated fidelity of 96.80% and efficiently generates entangled Dicke states with over 99% fidelity by leveraging a robust spin-phonon dark state resilient to spectral inhomogeneity and excited-state loss. The platform offers potential scalability and all-to-all connectivity via phonons, along with optical links, enabling both entanglement generation and quantum acoustics studies in the solid state.

npj Quantum InformationVol. 11(1)
University of Stuttgart (DE), Argonne National Laboratory (US), Hefei University of Technology (CN), University of Chicago (US), Max Planck Institute for Solid State Research (DE)
U.S. Department of Energy, Baden-Württemberg Stiftung, Deutsche Forschungsgemeinschaft, Bundesministerium für Bildung und Forschung, Center for Integrated Quantum Science and Technology, Office of Science, U.S. Air Force, Air Force Office of Scientific Research, Army Research Office
Openalex Percentile: Top 9%
Mechanical and Optical Resonators
2.49
DOIOpen Access PDFOpenAlex
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