We report intermittent large spiking events in a heterogeneous network of forced Josephson junctions under the influence of repulsive interaction. The response of the individual junctions has been inspected instead of the collective response of the ensemble, which reveals the large spiking events in a subpopulation with characteristic features of extreme events (EE). The network splits into three clusters of junctions, one in coherent libration, one in incoherent rotational motion, and another subpopulation originating EE, which resembles a chimeralike pattern. EE migrates spatially from one to another subpopulation of junctions with the repulsive strength. The origin of EE in a subpopulation and chimera pattern is a generic effect of distributed damping parameter and repulsive interaction, which we verify with another network of the Liénard system. EE originates in the subpopulation via a local riddling of in-phase synchronization. The probability density function of event heights confirms the rare occurrence of large events and the return time of EE as expressed by interevent intervals in the subgroup follows a Poisson distribution. The mechanism of the origin of such a unique clustering is explained qualitatively.

中文翻译：

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异质约瑟夫森结网络中的极端事件

我们报告在排斥相互作用的影响下，强迫约瑟夫森结的异构网络中的间歇性大峰值事件。已经检查了各个路口的响应，而不是集合的集体响应，这揭示了具有极端事件（EE）特征的子种群中的大尖峰事件。该网络分为三个结点簇，一个簇是连贯的释放，一个簇是不连贯的旋转运动，另一个簇是起源于EE的亚群，类似于嵌合体模式。EE具有排斥力，在空间上从一个结点的一个亚群迁移到另一个结点的亚群。EE在亚群和嵌合体模式中的起源是分布阻尼参数和排斥相互作用的普遍效应，我们用Liénard系统的另一个网络进行了验证。EE通过同相同步的本地操作起源于子种群。事件高度的概率密度函数证实了大事件的罕见发生，并且由子组中的事件间隔表示的EE返回时间遵循泊松分布。定性地解释了这种独特聚类的起源机理。