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arXiv 1611.04232nlin.AO
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具有双谐相互作用的非局域耦合相位振子中的嵌合态

Chimera states in nonlocally coupled phase oscillators with biharmonic interaction

Hongyan Cheng, Qionglin Dai, Nianping Wu, Yuee Feng, Haihong Li, Junzhong Yang

摘要:

嵌合态是由相干和非相干部分共存的区域组成的,已经在各种系统中观察到。以往的嵌合态研究大多考虑了振子之间的特定形式的相互作用,例如正弦耦合或扩散耦合。在这里,我们研究了具有双谐相互作用的非局域耦合相位振子中的嵌合体动力学。我们发现了新的嵌合态的特征,如在同一个相干集群中的振荡器可以分成两组,它们之间的相位差在π/2左右,相邻相干集群中的振荡器可能有一个接近π/2的相位差。基于全局耦合相位振子的同步动力学,研究了一次谐波和二次谐波相互作用的耦合范围对嵌合体动力学的不同影响。我们的研究为嵌合体动力学领域提出了一个新的方向。

英文摘要:

Chimera states, which consist of coexisting domains of coherent and incoherent parts, have been observed in a variety of systems. Most of previous works on chimera states have taken into account specific form of interaction between oscillators, for example sinusoidal coupling or diffusive coupling. Here, we investigate chimera dynamics in nonlocally coupled phase oscillators with biharmonic interaction. We find novel chimera states with features such as that oscillators in the same coherent cluster may split into two groups with a phase difference between them at around pi/2 and that oscillators in adjacent coherent clusters may have a phase difference close to pi/2. The different impacts of the coupling ranges in the first and the second harmonic interactions on chimera dynamics are investigated based on the synchronous dynamics in globally coupled phase oscillators. Our study suggests a new direction in the field of chimera dynamics.

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