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arXiv 1404.0693nlin.CD
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耦合振子从振幅到振荡死亡转变的实验观察

Experimental observation of a transition from amplitude to oscillation death in coupled oscillators

Tanmoy Banerjee, Debarati Ghosh

摘要:

本文首次报道了耦合极限环振子从振幅死亡(AD)态到振荡死亡(OD)态的一个重要跃迁现象的实验证据。我们考虑两个通过平均场扩散耦合的Van der Pol振子,并证明了这个系统表现出从AD到OD的转变,这在相同的耦合方案下已经在早期的Stuart-Landau振子中得到了证明[T. Banerjee和D. Ghosh,arXiv:1403.2907,2014]。我们表明,AD-OD过渡是由平均场的密度和超过临界值,这种过渡被破坏,进一步,我们表明存在一个非平凡的AD状态,共存的OD。接下来,我们在电子电路中实现该系统,并通过实验确认从AD到OD状态的转变。我们进一步描述了发生这种转变的实验参数区。目前的研究可能会刺激搜索的实际系统中,这一重要的转变的情况下,可以观察到实验。

英文摘要:

We report the first experimental evidence of an important transition scenario, namely the transition from amplitude death (AD) to oscillation death (OD) state in coupled limit cycle oscillators. We consider two Van der Pol oscillators coupled through mean-field diffusion and show that this system exhibits a transition from AD to OD, which was earlier shown for Stuart-Landau oscillators under the same coupling scheme [T. Banerjee and D. Ghosh, arXiv:1403.2907, 2014]. We show that the AD-OD transition is governed by the density of mean-field and beyond a critical value this transition is destroyed; further, we show the existence of a nontrivial AD state that coexists with OD. Next, we implement the system in an electronic circuit and experimentally confirm the transition from AD to OD state. We further characterize the experimental parameter zone where this transition occurs. The present study may stimulate the search for the practical systems where this important transition scenario can be observed experimentally.

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