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arXiv 0909.0183cond-mat.stat-mech
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具有幂律力的确定性反应模型

Deterministic reaction models with power-law forces

Daniel ben-Avraham, Oleksandr Gromenko, Paolo Politi

摘要:

我们研究一个一维粒子系统,在过阻尼的限制,最近的粒子吸引力成反比的权力,他们的距离和合并后遇到。相邻粒子之间间隙的分布函数的详细形状可以区分不同的引力定律。我们开发了一个精确的福克-普朗克方法的无限层次的分布函数多个相邻的差距,并解决它完全,在平均场水平,相关性被忽略。相关性的关键作用和它们对间隙分布函数的影响进行了探讨数值和分析。最后,我们分析了一个随机输入的粒子,这导致在一个稳定的状态,在那里的相关性的影响大大减少。

英文摘要:

We study a one-dimensional particles system, in the overdamped limit, where nearest particles attract with a force inversely proportional to a power of their distance and coalesce upon encounter. The detailed shape of the distribution function for the gap between neighbouring particles serves to discriminate between different laws of attraction. We develop an exact Fokker-Planck approach for the infinite hierarchy of distribution functions for multiple adjacent gaps and solve it exactly, at the mean-field level, where correlations are ignored. The crucial role of correlations and their effect on the gap distribution function is explored both numerically and analytically. Finally, we analyse a random input of particles, which results in a stationary state where the effect of correlations is largely diminished.

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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