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中国物理学会期刊

高阶耦合相振子系统的同步动力学

CSTR: 32037.14.aps.70.20211206

Collective dynamics of higher-order coupled phase oscillators

CSTR: 32037.14.aps.70.20211206
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  • 由大量耦合相振子组成的Kuramoto模型是研究各种自持续振荡系统同步相变和集体动力学的重要模型. 近些年, 高阶耦合Kuramoto模型引起了广泛的研究兴趣, 尤其高阶耦合结构在模拟编码和信息存储的动力学方面起到重要作用. 为了研究高阶耦合的影响, 本文通过考虑频率与耦合之间的关联对高阶耦合的Kuramoto模型进行了推广, 所得到的模型出现了一些新颖的动力学现象, 包括多集团态(多团簇态)、双稳态、爆炸性同步以及振荡态. 对无序态的线性稳定分析得到表征系统由无序向同步转变的临界耦合强度, 利用自洽方法分析得到系统的多团簇态, 并进一步在等效低维子空间中对多团簇态进行线性稳定性分析得到稳定的多团簇态解以及去同步相变点. 对理论分析结果的讨论总结了系统由迟滞到振荡态的转变. 此外, 本文强调结合表征系统不对称性的Kuramoto序参量和表征系统多团簇态的Daido序参量可以对系统宏观动力学给出完整的描述. 通过本文的研究可以进一步加深对高阶耦合相振子系统中耦合异质性以及爆炸性同步的理解.

     

    The Kuramoto model consisting of large ensembles of coupled phase oscillators serves as an illustrative paradigm for studying the synchronization transitions and collective behaviors in various self-sustained systems. In recent years, the research of the high-order coupled phase oscillators has attracted extensive interest for the high-order coupled structure playing an essential role in modeling the dynamics of code and data storage. By studying the effects of high-order coupling, we extend the Kuramoto model of high-order structure by considering the correlations between frequency and coupling, which reflects the intrinsic properties of heterogeneity of interactions between oscillators. Several novel dynamic phenomena occur in the model, including clustering, extensive multistability, explosive synchronization and oscillatory state. The universal form of the critical coupling strength characterizing the transition from disorder to order is obtained via an analysis of the stability of the incoherent state. Furthermore, we present the self-consistent approach and find the multi-cluster with their expressions of order parameters. The stability analysis of multi-cluster is performed in the subspace getting stability condition together with the stable solutions of order parameters. The discussion of all the results summarizes the mechanism of the transition from hysteresis to oscillatory states. In addition, we emphasize that the combination of the Kuramoto order parameter capturing the asymmetry of the system and the Daido order parameter representing the clustering can give a complete description of the macroscopic dynamics of the system. The research of this paper can improve the understanding of the effects of the heterogeneity among populations and the explosive synchronization occurring in higher-order coupled phase oscillators.

     

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