从布郎运动的碰撞机制导出郎之万方程  

The Elastic Collision Mechanism of Brownian Motion Leads to the Lagevin Equation

作　　者：贺晓宏[1] 

机构地区：[1]太原理工大学理学院

出　　处：《太原理工大学学报》2001年第2期206-208,共3页Journal of Taiyuan University of Technology

摘　　要：研究了布郎运动的弹性碰撞机制 ,证明了布郎粒子的能量均分定理。并且证明由布郎粒子和周围分子的碰撞过程 ,可以导出郎之万方程 ,并给出粘滞阻力和随机力的微观解释。The elastic collision mechanism of Brownian motion is studied,and the equipartition of kinetic energy of Brownian particle has been proved.The author shows how the collision between a Brownian particle and its surrounding molecules lead to the Lagevin equation,and gives us the subtle explanation of damping and stochastic forces.

关 键 词：弹性碰撞 布郎运动 郎之万方程 碰撞机制 

分 类 号：O562.5[理学—原子与分子物理]