Abstract
Synchronization in complex networks is influenced by higher-order interactions and non-Gaussian perturbations, yet their mechanisms remain unclear. We investigate the synchronization and spike dynamics in a higher-order Kuramoto model subjected to Lévy noise. Using the mean order parameter, mean first-passage time, and basin stability, we identify boundaries distinguishing synchronization and incoherence. The stability index governs the tail heaviness of the probability density function for Lévy noise, while the scale parameter affects the magnitude. Synchronization weakens as the stability index decreases, and even completely disappears when the scale parameter exceeds a critical threshold. By varying coupling, we find bifurcations and hysteresis. Lévy noise smooths the synchronization transitions and requires stronger coupling compared to Gaussian white noise. We then define spikes as extreme excursions of the order parameter and study their statistical and spectral properties. The maximum number of spikes is observed at small-scale parameters. A generalized spectral analysis based on an edit distance algorithm measures the similarity between spike sequences and identifies spike patterns. These findings deepen the understanding of synchronization and extreme events in complex networks driven by non-Gaussian noise.

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Acknowledgements
This work is supported by the Key International (Regional) Joint Research Program of the National Natural Science Foundation (NSF) of China under Grant No. 12120101002. D. Zhao thanks the Sino-German (CSC-DAAD) Postdoc Scholarship Program.
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D.Z. and Y.X. conceived and designed the research. D.Z. performed the main calculations and data analysis. J.K. and N.M. contributed to the development of the methodology and the interpretation of the results. D.Z. wrote the original draft of the manuscript. J.K., N.M., and Y.X. supervised the work and critically revised the manuscript. All authors discussed the results and approved the final version of the manuscript.
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Communications Physics thanks Sarika Jalan, Zhigang Zheng and the other anonymous reviewer(s) for their contribution to the peer review of this work.
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Zhao, D., Kurths, J., Marwan, N. et al. Synchronization transitions and spike dynamics in a higher-order Kuramoto model with Lévy noise. Commun Phys (2026). https://doi.org/10.1038/s42005-026-02560-4
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DOI: https://doi.org/10.1038/s42005-026-02560-4


