摘要
应用变分法研究了一个单模非线性光学系统的弛豫速率对噪声强度的依赖性 ,并由线性响应理论考察了该系统的随机共振行为 .研究结果表明当系统没有偏置时 ,单稳与多稳情形下的松弛速率对噪声强度的依赖性表现出很大的不同 .揭示了对称的一维单稳系统中的随机共振现象 ,并针对一维单稳系统中随机共振存在的一般条件进行了分析 .
The variational method is applied to a single-mode stochastic nonlinear optical system and the dependence of its relaxation rate and spectral amplification factor on the noise intensity based on the linear response theory is investigated. The investigation shows that when the biased input is vanishing,the relaxation rate has different dependence in monostable and multistable cases. The investigation also shows that the stochastic resonance occurs in one-dimensional symmetric monostable potential,and the possible condition for it is pointed out.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第11期2712-2717,共6页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :19972 0 5 1和 10 172 0 67)资助的课题~~
