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arXiv 2408.03597math.AP
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长时间有效性:从牛顿定律出发线性化的玻色-爱因斯坦方程和兰道方程

Long time validity of the linearized Boltzmann uncut-off and the linearized Landau equations from the Newton Law

Corentin Le Bihan

AI总结:

本文首次从具有长程幂律相互作用的粒子系统出发,推导出线性化玻色-爱因斯坦方程和兰道方程,并证明了库仑奇点的阈值效应。

摘要:

我们提供了从具有长程相互作用的粒子系统出发,线性化玻色-爱因斯坦方程和兰道方程的严格论证。结果表明,由截断幂律势能形式U(r)~|r/ε|^{-s}(在r≈0附近)支配的哈密顿N粒子系统的波动,在适当的尺度极限ε→0和N→∞下,收敛到动力学方程的解。我们证明,对于s∈[0,1),极限系统趋近于线性化玻色-爱因斯坦方程或线性化兰道方程,这取决于尺度极限。库仑奇点s=1出现为阈值值。具有s∈(0,1]的动力学尺度极限普遍收敛到线性化兰道方程,我们证明了s=1时库仑对数的出现。据我们所知,这是首次从具有长程幂律相互作用的粒子系统出发推导动力学方程的结果。

英文摘要:

We provide a rigorous justification of the linearized Boltzmann- and Landau equations from interacting particle systems with long-range interaction. The result shows that the fluctuations of Hamiltonian $N$- particle systems governed by truncated power law potentials of the form $\mathcal{U}(r)\sim |r/\varepsilon|^{-s}$ (near $r \approx 0$) converge to solutions of kinetic equations in appropriate scaling limits $\varepsilon \rightarrow 0$ and $N\rightarrow \infty$. We prove that for $s\in [0,1)$, the limiting system approaches the uncutoff linearized Boltzmann equation or the linearized Landau equation, depending on the scaling limit. The Coulomb singularity $s=1$ appears as a threshold value. Kinetic scaling limits with $s\in (0,1]$ universally converge to the linearized Landau equation, and we prove the onset of the Coulomb logarithm for $s=1$. To the best of our knowledge, this is the first result on the derivation of kinetic equations from interacting particle systems with long-range power-law interaction.

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