摘要
阐述了一个产生从红噪声到绿噪声的多色噪声源的途径 ,给出了这种噪声的关联函数和谱密度。提出用积分闭合方法模拟多色噪声 ,用龙格—库塔方法求解朗之万方程的整体。研究了在锯齿型周期势场中运动的布朗粒子的平均输运行为。结果表明 :绿噪声所趋动的粒子的稳定速流与通常的红噪声的结果相反 ,存在一个使粒子运动方向反转的某种颜色噪声。
An approach is proposed for producing a multi colored noise from red noise to green one, and the correlation and spectral functions of this noise are given. It uses an integral\|closed relation to simulate the multi colored noise, and employs the Runge Kutta algorithm to solve the Langevin equation itself. The average feature of the transport for a Brownian particle moving in a ratchet periodic potential is studied. The results show that the direction of the current driven by the green noise is opposite to the one driven by the red noise, and there is a noise with certain color which makes the current reversal. [
出处
《计算物理》
CSCD
北大核心
2000年第3期254-258,共5页
Chinese Journal of Computational Physics
基金
教育部"优秀年轻教师基金"
国家自然科学基金资助项目!(196 0 5 0 0 2 )
