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arXiv 0903.3860nlin.AO
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非均匀相位振荡器系综中噪声和耦合的相互作用

Interplay of noise and coupling in heterogeneous ensembles of phase oscillators

Damian H. Zanette

摘要:

我们研究了噪声对耦合相位振荡器系综集体动力学的影响,这些振荡器的固有频率全部相同,但其耦合强度在整个系综中并不相同。噪声的强度也可以是异质的,代表个体对外部波动的反应的多样性。我们表明,由噪声引起的去极化转变可能会被完全抑制,即使是任意大的噪声强度,耦合强度的分布衰减足够慢的大耦合。同样地,如果集合中足够大的一部分对噪声的响应足够弱,则不可能发生去噪声化。当对噪声的响应和每个振子的耦合强度相关时,这两种效应相互结合。这种组合的定量特征和说明明确的例子。

英文摘要:

We study the effects of noise on the collective dynamics of an ensemble of coupled phase oscillators whose natural frequencies are all identical, but whose coupling strengths are not the same all over the ensemble. The intensity of noise can also be heterogeneous, representing diversity in the individual responses to external fluctuations. We show that the desynchronization transition induced by noise may be completely suppressed, even for arbitrarily large noise intensities, is the distribution of coupling strengths decays slowly enough for large couplings. Equivalently, if the response to noise of a sufficiently large fraction of the ensemble is weak enough, desynchronization cannot occur. The two effects combine with each other when the response to noise and the coupling strength of each oscillator are correlated. This combination is quantitatively characterized and illustrated with explicit examples.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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