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arXiv 0909.4505math.PR
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分数阶布朗运动驱动的亚椭圆偏微分方程的遍历性

Ergodicity of hypoelliptic SDEs driven by fractional Brownian motion

Martin Hairer, Natesh S. Pillai

摘要:

证明了Hurst参数H > 1/2的分数阶布朗运动驱动的随机微分方程与标准布朗运动驱动的随机微分方程具有相似的遍历性.本文的重点是满足Hörmander条件的亚椭圆方程组。我们表明,这样的系统满足一个合适的版本的强Feller属性,我们的结论是,他们承认一个独特的固定的解决方案,是物理的意义上说,它不“展望未来”。分析所需的主要技术结果是Malliavin协方差阵的逆的矩的界,条件是驾驶噪声的过去。

英文摘要:

We demonstrate that stochastic differential equations (SDEs) driven by fractional Brownian motion with Hurst parameter H > 1/2 have similar ergodic properties as SDEs driven by standard Brownian motion. The focus in this article is on hypoelliptic systems satisfying Hörmander's condition. We show that such systems satisfy a suitable version of the strong Feller property and we conclude that they admit a unique stationary solution that is physical in the sense that it does not "look into the future". The main technical result required for the analysis is a bound on the moments of the inverse of the Malliavin covariance matrix, conditional on the past of the driving noise.

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