NOISE-INDUCED METASTABILITY IN A DYNAMIC SYSTEM

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题名:	NOISE-INDUCED METASTABILITY IN A DYNAMIC SYSTEM
作者:	LEUNG,HK
贡献者:	物理研究所
关键词:	VOLTERRA;ATTRACTORS;POINT;MODEL
日期:	1992
上传时间:	2010-07-08 14:13:14 (UTC+8)
出版者:	中央大學
摘要:	Transient properties of the Lotka-Volterra model perturbed by external white noise have been investigated. Stochastic metastability was observed for a degenerate case in which both order parameters shared the same rates and initiated from the common deterministic fixed point. Near this unique state, fluctuations have been shown analytically to be diverging with time, while mean values and the Lyapunov function remained unchanged. Fluctuations in order parameters due to additive noises have been found to have the same time dependence as Brownian particles. Those due to multiplicative noises have shown deviations at larger times and for larger noise intensities. The time duration over which this metastable state could persist has been estimated for three types of noises. Noise effects associated with different nonlinearities were compared systematically and explicitly.
關聯:	PHYSICAL REVIEW A
显示于类别:	[物理研究所] 期刊論文

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