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arXiv 1007.1992cond-mat.stat-mech
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低密度气体中分子无规行走的统计和1/f噪声

On statistics and 1/f noise of molecular random walk in low-density gas

Yu. E. Kuzovlev

摘要:

基于BBGKY方程的近似粗化的碰撞表象,考虑了试验粒子在低密度气体中的无规行走。粗化假设测试粒子和气体原子的动量弛豫速率相等,但允许分析它们的质量不同的情况。结果表明,试验粒子的1/f型扩散系数涨落的谱指数和概率分布都与质量比有关,并找到了相应的路径分布。

英文摘要:

The random walk of test particle in low-density gas is considered basing on approximate coarsened version of the collisional representation of the BBGKY equations. The coarsening presumes that momentum relaxation rates of the test particle and gas atoms are equal but allows to analyze the case when their masses are different. It is shown that both the spectrum exponent and probability distribution of 1/f-type diffusivity fluctuations of the test particle essentially depend on ratio of the masses, and corresponding distribution of its path is found.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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