Critical behavior and the limit distribution for long-range oriented percolation. II: Spatial correlation

Details Critical behavior and the limit distribution for long-range oriented percolation. II: Spatial correlation Critical behavior and the limit distribution for long-range oriented percolation. II: Spatial correlation

2008-04-13

arxiv.org/abs/0804.2039v3

Mathematics

Probability

20 pages, 1 figure

Scientific paper

We prove that the Fourier transform of the properly-scaled normalized two-point function for sufficiently spread-out long-range oriented percolation with index \alpha>0 converges to e^{-C|k|^{\alpha\wedge2}} for some C\in(0,\infty) above the upper-critical dimension 2(\alpha\wedge2). This answers the open question remained in the previous paper [arXiv:math/0703455]. Moreover, we show that the constant C exhibits crossover at \alpha=2, which is a result of interactions among occupied paths. The proof is based on a new method of estimating fractional moments for the spatial variable of the lace-expansion coefficients.

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