Chimera States in Continuous Media: Existence and Distinctness.
Chimera States in Continuous Media: Existence and Distinctness.
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连续媒体中的奇美拉状态：存在与独特性。
DOI：
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发表时间：
2017
影响因子：
8.6
通讯作者：
A. Motter
中科院分区：
文献类型：
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作者：
Zachary G. Nicolaou;Hermann Riecke;A. Motter
嵌合态的定义性质是在结构和空间均质的系统中相干域和非相干域的共存。最近认识到这种状态可能在振荡器网络中很常见，提出了一个问题，即类似的现象是否会发生在连续介质中。在这里，我们证明了嵌合体状态可以存在于连续系统中，即使耦合是严格局部的，如在许多流体和模式形成介质中。利用复金兹堡-朗道方程作为模型系统，我们描述了由冻结螺旋结构的相干域和振幅湍流的非相干域组成的嵌合体状态。我们表明，在这种情况下，与离散网络系统相比，局部耦合场的波动在限制相干区域方面起着至关重要的作用。我们认为这些发现揭示了流体系统中共存秩序和无序的新可能形式。
The defining property of chimera states is the coexistence of coherent and incoherent domains in systems that are structurally and spatially homogeneous. The recent realization that such states might be common in oscillator networks raises the question of whether an analogous phenomenon can occur in continuous media. Here, we show that chimera states can exist in continuous systems even when the coupling is strictly local, as in many fluid and pattern forming media. Using the complex Ginzburg-Landau equation as a model system, we characterize chimera states consisting of a coherent domain of a frozen spiral structure and an incoherent domain of amplitude turbulence. We show that in this case, in contrast with discrete network systems, fluctuations in the local coupling field play a crucial role in limiting the coherent regions. We suggest these findings shed light on new possible forms of coexisting order and disorder in fluid systems.