【摘要】 讨论轨道的随机涨落对布朗粒子输运特性的影响.势场为一个线性锯齿势加上一个两态随机势,用随时间变化的正弦函数作为摇摆力.计算了布朗粒子在周期势场中运动的几率流随温度的变化关系.得到几率流在不同的外部随机势强度及关联长度情况下的结果,随机势强度及关联长度对几率流有明显的影响.更多还原

【Abstract】 A theoretical model for the directed motion of Brownian particle in a periodic potential with a position-dependent two state random perturbation and a sinusoidal external force was proposed. It is shown that the maximum of the current decreases but the corresponding temperature increases with the increase of the stochastic potentials intensity, and the correlation length of the random potential also influences the magnitude of the current.更多还原