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arXiv 1202.5172math.PRmath-phmath.MP
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高斯自由场的相变和能级渗流

Phase transition and level-set percolation for the Gaussian free field

Pierre-François Rodriguez, Alain-Sol Sznitman

摘要:

本文研究了Z^d上高斯自由场的水平集渗流,其中d ≥ 3,证明了存在一个非平凡的临界水平h *,使得当h > h * 时,水平h以上的偏移集不渗流,而当h < h * 时,偏移集渗流.由Bricmont-Lebowitz-Maes的工作可知,对于所有大于或等于3的d,h_* 是非负的,当d=3时,h_* 是有限的。本文证明了对所有大于或等于3的d,h_* 是有限的。实际上,我们引入了第二个临界参数h_**,它大于或等于h_*。我们证明了对所有大于或等于3的d,h ** 是有限的;对所有h > h **,h以上的漂移集的连通性函数是拉伸指数衰减的.最后证明了在高维情况下h_* > 0。h_* 和h_** 是否实际上重合,以及对于所有大于或等于3的d,h_* 是否> 0,这一点仍然没有定论。

英文摘要:

We consider level-set percolation for the Gaussian free field on Z^d, with d bigger or equal to 3, and prove that there is a non-trivial critical level h_* such that for h > h_*, the excursion set above level h does not percolate, and for h < h_*, the excursion set does percolate. It is known from the work of Bricmont-Lebowitz-Maes that h_* is non-negative for all d bigger or equal to 3, and finite, when d=3. We prove here that h_* is finite for all d bigger or equal to 3. In fact, we introduce a second critical parameter h_**, which is bigger or equal to h_*. We show that h_** is finite for all d bigger or equal to 3, and that the connectivity function of the excursion set above level h has stretched exponential decay for all h > h_**. Finally we prove that h_* > 0 in high dimension. It remains open whether h_* and h_** actually coincide, and whether h_* > 0 for all d bigger or equal to 3.

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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