Stochastic resonance in a stochastic bistable system

Stochastic resonance in a stochastic bistable system
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随机双稳态系统中的随机共振

DOI:
10.1088/1742-5468/2007/02/p02019
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发表时间:
2007-02
影响因子:
2.4
通讯作者:
Liu, Liang-gang
Liu, Liang-gang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Ai, Bao-quan;Liu, Liang-gang

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研究了双稳系统在随机势作用下的随机共振问题。信噪比(SNR)的计算采用两状态法。结果表明,随着随机势强度的增加,信噪比存在从一个峰到两个峰,然后再到一个峰,最后到无峰的转变。一个最优随机势可能会引起双随机共振。当随机势强度过大时,双势垒效应减弱,随机共振现象消失。
Stochastic resonance (SR) in a bistable system is investigated in the presence of a stochastic potential. The signal-to-noise ratio (SNR) is calculated by using the two-state approach. It is found that there exist transitions in SNR from one peak to two peaks, then to one peak again and finally to no peak on increasing the intensity of the stochastic potential. An optimal stochastic potential may induce a doubly stochastic resonance (DSR). When the intensity of the stochastic potential is too large, the effect of the double well diminishes and the SR phenomenon disappears.
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