arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.13991math.NAcs.NA
收藏

随机Poisson系统的保漂移数值积分器

Drift-preserving numerical integrators for stochastic Poisson systems

David Cohen, Gilles Vilmart

摘要:

本文对一类随机扰动的{H} Hamilton系统和{P}oisson系统进行了数值分析。对于所考虑的加性噪声扰动的系统,我们证明了能量和二次Casimirs的精确解的长时间行为。然后,我们提出并分析了一个漂移保持分裂计划,这样的问题具有以下性质:精确漂移保持能量和二次卡西米尔,均方收敛阶1,弱收敛阶2。数值实验说明了这些性质。

英文摘要:

We perform a numerical analysis of a class of randomly perturbed {H}amiltonian systems and {P}oisson systems. For the considered additive noise perturbation of such systems, we show the long time behavior of the energy and quadratic Casimirs for the exact solution. We then propose and analyze a drift-preserving splitting scheme for such problems with the following properties: exact drift preservation of energy and quadratic Casimirs, mean-square order of convergence one, weak order of convergence two. These properties are illustrated with numerical experiments.

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。

↑