arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.04539nlin.AOcond-mat.stat-mech
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小世界网络上耦合相位振子模型的临界指数

Critical exponents in coupled phase-oscillator models on small-world networks

Ryosuke Yoneda, Kenji Harada, Yoshiyuki Y. Yamaguchi

摘要:

耦合相位振子模型由相位振子组成,每个相位振子的固有频率服从概率分布,并通过给定的周期耦合函数与其他振子耦合。这种类型的模型被广泛研究,因为它描述了同步过渡,出现在非同步状态和部分同步状态之间。同步跃迁由几个临界指数来表征,我们重点讨论了由序参量的耦合强度依赖性定义的临界指数来揭示普适类.在由完美图表示的典型相互作用中,通过依赖于固有频率分布和耦合函数产生无限数量的普适类。由于在小世界网络的模型中也观察到同步跃迁,其链接数量与振荡器的数量成正比,一个自然的问题是,在小世界网络中是否存在无限数量的普适类,而不管链接的顺序如何。我们的数值计算结果表明,普适类的数量减少到一个和临界指数是共享所考虑的模型具有耦合功能的二次谐波单峰和对称的固有频率分布。

英文摘要:

A coupled phase-oscillator model consists of phase-oscillators, each of which has the natural frequency obeying a probability distribution and couples with other oscillators through a given periodic coupling function. This type of model is widely studied since it describes the synchronization transition, which emerges between the non-synchronized state and partially synchronized states. The synchronization transition is characterized by several critical exponents, and we focus on the critical exponent defined by coupling strength dependence of the order parameter for revealing universality classes. In a typical interaction represented by the perfect graph, an infinite number of universality classes is yielded by dependency on the natural frequency distribution and the coupling function. Since the synchronization transition is also observed in a model on a small-world network, whose number of links is proportional to the number of oscillators, a natural question is whether the infinite number of universality classes remains in small-world networks irrespective of the order of links. Our numerical results suggest that the number of universality class is reduced to one and the critical exponent is shared in the considered models having coupling functions up to the second harmonics with unimodal and symmetric natural frequency distributions.

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