Stochastic resonance: Noise-enhanced phase coherence
Stochastic resonance: Noise-enhanced phase coherence
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DOI：
10.1103/physreve.58.7118
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发表时间：
1998-12-01
影响因子：
2.4
通讯作者：
Schimansky-Geier, L
中科院分区：
文献类型：
--
作者：
Neiman, A;Silchenko, A;Schimansky-Geier, L
从相位同步的角度研究了周期驱动随机混沌系统的随机共振。通过引入输出的瞬时相位，我们明确地显示了输入和输出之间的锁相效果。输入和输出之间的相位差的随机动力学似乎是类似的同步经典自持振荡器。相位相干度的估计，采用有效的扩散常数的相位差。这种相干性对于最佳噪声强度变得最大。然而，相位同步效果只能观察到足够大的幅度的周期性输入信号。[S1063-651X（98）11812-3]。
We study stochastic resonance in periodically driven stochastic bistable systems in terms of phase synchronization. By introduction of an instantaneous phase for the output we show explicitly the effect of phase locking between the input and output. The stochastic dynamics of the phase difference between input and output appears to be similar to that of synchronized classical self-sustained oscillators. The degree of phase coherence is estimated by employing the effective diffusion constant for the phase difference. This coherence becomes maximal for optimal noise intensities. However, phase synchronization effects can only be observed for sufficiently large magnitude of the periodic inputting signal. [S1063-651X(98)11812-3].