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arXiv 1208.5753math.AP
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从牛顿到玻尔兹曼:硬球和短程势

From Newton to Boltzmann: hard spheres and short-range potentials

Isabelle Gallagher, Laure Saint-Raymond, Benjamin Texier

摘要:

我们严格推导了玻尔兹曼方程作为硬球系统或通过短程势相互作用的牛顿粒子系统的介观极限,当粒子数$N$趋于无穷大,并且在玻尔兹曼-格拉德标度$N \e^{d-1} \equiv 1.$中相互作用的特征长度$\e$同时趋于$0,$时,收敛的有效时间是第一次碰撞的平均时间的一小部分,由于证明BBGKY和Boltzmann族的统一估计的时间限制。我们的证明依赖于兰福德的基本思想,以及国王,Cercignani,Illner和Pulvirenti,Cercignani,Gerasimenko和Petrina的重要贡献。这里的主要新颖之处是详细研究的病理轨迹,涉及的相关级数展开,这证明了长期的收敛性。

英文摘要:

We provide a rigorous derivation of the Boltzmann equation as the mesoscopic limit of systems of hard spheres, or Newtonian particles interacting via a short-range potential, as the number of particles $N$ goes to infinity and the characteristic length of interaction $\e$ simultaneously goes to $0,$ in the Boltzmann-Grad scaling $N \e^{d-1} \equiv 1.$ The time of validity of the convergence is a fraction of the average time of first collision, due to a limitation of the time on which one can prove uniform estimates for the BBGKY and Boltzmann hierarchies. Our proof relies on the fundamental ideas of Lanford, and the important contributions of King, Cercignani, Illner and Pulvirenti, and Cercignani, Gerasimenko and Petrina. The main novelty here is the detailed study of pathological trajectories involving recollisions, which proves the term-by-term convergence for the correlation series expansion.

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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