环境温度对布朗粒子定向运动的影响

The Influence of Environment Temperature to the Brownian Particle's Directed Motion

将高斯色噪声作为系统的非平衡涨落，建立布朗粒子含惯性、阻尼及双源噪声的动力学模型，着重讨论了环境温度对粒子输运过程的影响．应用 Ｌａｎｇｅｖｉｎ Ｍｏｎｔｅ Ｃａｒｌｏ方法，得出布朗粒子稳态流的大小与环境温度有关，且不随环境温度单调变化．

The colored noise is considered as a non-equilibrium fluctuation of system, the Brownine particle's Langevin diffusion equation including damping force,inertia ratchet potential and two noise sources is proposed. The influence of environment tamperature to particle's transport process is studied. It is found that the size of steady current in Langevin diffusion equation including damping force, inertia ratchet potential and two noise sources have relevance to environment temperature, and the change of steady current is not monotone with monotone increasing of environment temperature by using Langevin Monte Carlo's method.