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

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

2010-07-12

arxiv.org/abs/1007.1992v1

Physics

Condensed Matter

Statistical Mechanics

6pages, no figures, Latex RevTex4

Scientific paper

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.

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