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arXiv 1601.06408math.PR
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广义高斯自由场与随机均匀化

On generalized Gaussian free fields and stochastic homogenization

Yu Gu, Jean-Christophe Mourrat

摘要:

本文研究高斯自由场概念的推广。虽然扩展似乎是次要的,我们首先表明,广义GFF不满足空间马尔可夫性,除非它是一个经典的GFF。在随机均匀化中,校正器的标度极限是一个可能的广义GFF描述的“有效波动张量”,我们表示为$\mathsf{Q}$。我们证明了$\mathsf{Q}$在小椭圆率区域的一个展开式。这种扩展表明,校正器的缩放极限不一定是经典的GFF,特别是不一定满足马尔可夫性。

英文摘要:

We study a generalization of the notion of Gaussian free field (GFF). Although the extension seems minor, we first show that a generalized GFF does not satisfy the spatial Markov property, unless it is a classical GFF. In stochastic homogenization, the scaling limit of the corrector is a possibly generalized GFF described in terms of an "effective fluctuation tensor" that we denote by $\mathsf{Q}$. We prove an expansion of $\mathsf{Q}$ in the regime of small ellipticity ratio. This expansion shows that the scaling limit of the corrector is not necessarily a classical GFF, and in particular does not necessarily satisfy the Markov property.

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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