Phase Transition and Level-Set Percolation for the Gaussian Free Field
Phase Transition and Level-Set Percolation for the Gaussian Free Field
复制标题
高斯自由场的相变和水平集渗流
DOI:
10.1007/s00220-012-1649-y
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发表时间:
2012
影响因子:
2.4
通讯作者:
A. Sznitman
中科院分区:
文献类型:
--
作者:
Pierre;A. Sznitman
We consider level-set percolation for the Gaussian free field on $${\mathbb{Z}^{d}}$$, d ≥ 3, and prove that, as h varies, there is a non-trivial percolation phase transition of the excursion set above level h for all dimensions d ≥ 3. So far, it was known that the corresponding critical level h*(d) satisfies h*(d) ≥ 0 for all d ≥ 3 and that h*(3) is finite, see Bricmont et al. (J Stat Phys 48(5/6):1249–1268, 1987). We prove here that h*(d) is finite for all d ≥ 3. In fact, we introduce a second critical parameter h** ≥ h*, show that h**(d) is finite for all d ≥ 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* is strictly positive in high dimension. It remains open whether h* and h** actually coincide and whether h* > 0 for all d ≥ 3.