Abstract
The advancement of magnonics has facilitated the utilization of hybrid magnetic systems in quantum technologies. A hybrid magnetic lattice formed by an array of superconducting loops and magnetic particles has been devised as a quantum bus to disseminate quantum resources among magnetic quantum entities serving as nodes of a quantum network. However, the lattice also exerts a decoherence effect on the quantum entities, which impairs its practical performance. By studying the non-Markovian dynamics of nitrogen-vacancy centers and magnon modes coupled to two independent hybrid magnetic lattices, we propose a Floquet-engineering scheme via periodic driving on the quantum entities to suppress decoherence. We find that significant steady-state entanglement is preserved when a Floquet bound state exists in the quasienergy spectrum of the system consisting of each driven quantum entity and its lattice. This result enables a precise manipulation of hybrid magnetic systems and benefits their applications in quantum networks.
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This work is supported by the National Natural Science Foundation of China (Grants No. 12275109, No. 92576202, and No. 12247101), the Innovation Program for Quantum Science and Technology of China (Grants No. 2023ZD0300904 and No. 2023ZD0300400), the Natural Science Foundation of Henan Province (Grant No. 242300421165 and No. 252300421779), and the Hubei Province Science Fund for Distinguished Young Scholars (Grant No. 2020CFA078).
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Ji, FZ., Bai, SY., Yang, WL. et al. Floquet engineering in hybrid magnetic quantum systems. Commun Phys (2026). https://doi.org/10.1038/s42005-026-02695-4
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DOI: https://doi.org/10.1038/s42005-026-02695-4
