arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.09462math.PRmath-phmath.MP
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与McKean-Vlasov方程相关的平均场相互作用粒子系统的长时间行为

Long-time behaviors of mean-field interacting particle systems related to McKean-Vlasov equations

Wei Liu, Liming Wu, Chaoen Zhang

摘要:

本文研究了与McKean-Vlasov方程相关的平均场弱相互作用粒子系统泊松方程的梯度估计,Wasserstein度量$W_{1,d_{l^1}}$下的指数收敛性,粒子数的一致性,以及混沌的时间一致性.利用已知的近似分量反射耦合,借助于新的费用函数,我们得到了这三个问题的显式估计,避免了已知结果中的技术条件.当约束势$V$有多个阱时,相互作用势$W$具有有界的二阶混合导数$\nabla^2_{xy}W$,但该二阶混合导数不应太大,从而不存在相变。作为应用,我们得到了在时间上一致的具有显式和锐常数的平均场相互作用粒子系统的浓度不等式。几个例子来说明的结果。

英文摘要:

In this paper, we investigate gradient estimate of the Poisson equation and the exponential convergence in the Wasserstein metric $W_{1,d_{l^1}}$, uniform in the number of particles, and uniform-in-time propagation of chaos for the mean-field weakly interacting particle system related to McKean-Vlasov equation. By means of the known approximate componentwise reflection coupling and with the help of some new cost function, we obtain explicit estimates for those three problems, avoiding the technical conditions in the known results. Our results apply when the confinement potential $V$ has many wells, the interaction potential $W$ has bounded second mixed derivative $\nabla^2_{xy}W$ which should be not too big so that there is no phase transition. As an application, we obtain the concentration inequality of the mean-field interacting particle system with explicit and sharp constants, uniform in time. Several examples are provided to illustrate the results.

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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