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摘要翻译：
我们感兴趣的是任意相互作用流体中的碰撞统计量。我们证明，即使在低密度极限下，与朴素预期相反，标记粒子在给定时间内经历的碰撞次数也不服从泊松定律，相反，自由飞行时间分布也不是简单的指数分布。作为例证，详细计算了硬球流体情况。对于这个模型，我们分析地量化了这些偏差，并成功地将我们的预测与分子动力学模拟进行了比较。
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英文标题：
《Non Poissonian statistics in a low density fluid》
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作者：
P. Visco, F. van Wijland, E. Trizac
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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英文摘要：
Our interest goes to the collisional statistics in an arbitrary interacting fluid. We show that even in the low density limit and contrary to naive expectation, the number of collisions experienced by a tagged particle in a given time does not obey Poisson law, and that conversely, the free flight time distribution is not a simple exponential. As an illustration, the hard sphere fluid case is worked out in detail. For this model, we quantify analytically those deviations and successfully compare our predictions against molecular dynamics simulations.
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PDF链接：
https://arxiv.org/pdf/801.2728
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