Chimera dynamics in nonlocally coupled moving phase oscillators

Chimera dynamics in nonlocally coupled moving phase oscillators
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非局部耦合动相振荡器中的嵌合动力学

DOI:
10.1007/s11467-019-0906-3
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发表时间:
2019-05
影响因子:
7.5
通讯作者:
Yang Jun Zhong
Yang Jun Zhong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang Wen Hao;Dai Qiong Lin;Cheng Hong Yan;Li Hai Hong;Yang Jun Zhong

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嵌合态是非局部耦合动力学单元中的一种时空模式,在各种系统中普遍存在。然而,在大多数嵌合态的研究中,振子之间的相互作用结构是静态的。在这项工作中,我们考虑人口的代理商。每个代理人都携带一个相位振荡器。我们假设代理执行布朗运动的环和相互作用的核函数依赖于它们之间的距离。当代理是不动的,该模型允许几个动态状态,包括两个不同的嵌合体状态(类型I和类型II嵌合体)。智能体的运动改变了它们之间的相对位置,并产生永久噪声,影响模型的动态特性。我们发现,耦合相位振子对主体运动的响应既依赖于决定嵌合态稳定性的相位滞后α,也依赖于主体迁移率D.对于低迁移率,当α接近π/2时,同步态过渡到I型嵌合态,否则吸引其他初始态。对于中等迁移率,耦合振子在不同的动力学状态之间随机跳跃,并且跳跃动力学依赖于α。我们调查的统计特性,在这些不同的动力学制度,并提出了之间的标度律的瞬态时间和流动性低流动性和之间的关系,不同的动态状态的平均寿命和流动性的中间流动性。
Chimera states, a symmetry-breaking spatiotemporal pattern in nonlocally coupled dynamical units, prevail in a variety of systems. However, the interaction structures among oscillators are static in most of studies on chimera state. In this work, we consider a population of agents. Each agent carries a phase oscillator. We assume that agents perform Brownian motions on a ring and interact with each other with a kernel function dependent on the distance between them. When agents are motionless, the model allows for several dynamical states including two different chimera states (the type-I and the type-II chimeras). The movement of agents changes the relative positions among them and produces perpetual noise to impact on the model dynamics. We find that the response of the coupled phase oscillators to the movement of agents depends on both the phase lag α, determining the stabilities of chimera states, and the agent mobilityD. For low mobility, the synchronous state transits to the type-I chimera state for α close to π/2 and attracts other initial states otherwise. For intermediate mobility, the coupled oscillators randomly jump among different dynamical states and the jump dynamics depends on α. We investigate the statistical properties in these different dynamical regimes and present the scaling laws between the transient time and the mobility for low mobility and relations between the mean lifetimes of different dynamical states and the mobility for intermediate mobility.
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