Brown粒子的速度相关函数和位移涨落二阶矩

Velocity Autocorrelation and Meansquare Displacement of Brownain Particle

根据Ｂｒｏｗｎ粒子间存在简谐束缚相互作用的物理模型，得到了过阻尼、临界阻尼和振荡阻尼近似条件下Ｂｒｏｗｎ粒子的速度相关函数与位移涨落二阶矩函数的解析解，并对所得结果进行了讨论。

By using a physics mode of harmonically bound Brownian particle,the ve-locity autocorrelation and mean-square displacement of particle under condition stronglyoverdamping case,critical damping case and oscillating damping case are calculated in detail.The results are discussed in the last section of this paper。