arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.01716math.NAcs.NA
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具有快速随机振动的微分方程的多旋转积分器

Multirevolution integrators for differential equations with fast stochastic oscillations

Adrien Laurent, Gilles Vilmart

摘要:

我们介绍了一种新的方法的基础上构造积分的随机微分方程的快速振荡本身的情况下,由Stratonovich噪声的多旋转的想法。应用包括特别是高振荡Kubo振荡器和空间离散的非线性薛定谔方程与快速白噪声色散。我们构造了一个弱二阶方法,其计算量和精度都与振动的刚度无关。还提出了一种几何修改,保存正是二次不变量。

英文摘要:

We introduce a new methodology based on the multirevolution idea for constructing integrators for stochastic differential equations in the situation where the fast oscillations themselves are driven by a Stratonovich noise. Applications include in particular highly-oscillatory Kubo oscillators and spatial discretizations of the nonlinear Schrödinger equation with fast white noise dispersion. We construct a method of weak order two with computational cost and accuracy both independent of the stiffness of the oscillations. A geometric modification that conserves exactly quadratic invariants is also presented.

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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