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arXiv 1302.0332cond-mat.stat-mech
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非线性对不同$d$维晶格逾渗稳定性的影响

Effect of Dimensionality on the Percolation Thresholds of Various $d$-Dimensional Lattices

Salvatore Torquato, Yang Jiao

摘要:

我们分析表明,$[0,1]$,$[1,1]$和$[2,1]$垫{é}近似的平均簇数$S(p)$一般$d$维晶格上的网站和债券渗流是上界这个数量在任何欧几里德维度$d$,其中$p$是占领概率。这些结果导致渗流阈值$p_c$的某些下限,其随着$d$增加而逐渐变紧,并且随着$d$变大而渐近精确。这些下界估计取决于$d$维晶格的结构,以及是否考虑了位点或键渗流。我们得到明确的界限$p_c$的网站和债券渗流在五种不同的晶格:$d$维推广的简单立方,体心立方和面心立方布拉维晶格以及$d$维推广的金刚石和kagom{é}(或烧绿石)非布拉维晶格。这些分析估计值用于评估各维度的可用模拟结果(在某些情况下直至$d=13$)。值得注意的是,最严格的下限提供了相对低维度的$p_c$的合理估计,并且随着$d$的增长而变得越来越准确。我们还推导出高维渐近展开$p_c$的10个渗流问题,并比较它们的贝特格近似。最后,我们评论的收敛半径的系列扩展的$S$在权力的$p$作为尺寸的增长。

英文摘要:

We show analytically that the $[0,1]$, $[1,1]$ and $[2,1]$ Pad{é} approximants of the mean cluster number $S(p)$ for site and bond percolation on general $d$-dimensional lattices are upper bounds on this quantity in any Euclidean dimension $d$, where $p$ is the occupation probability. These results lead to certain lower bounds on the percolation threshold $p_c$ that become progressively tighter as $d$ increases and asymptotically exact as $d$ becomes large. These lower-bound estimates depend on the structure of the $d$-dimensional lattice and whether site or bond percolation is being considered. We obtain explicit bounds on $p_c$ for both site and bond percolation on five different lattices: $d$-dimensional generalizations of the simple-cubic, body-centered-cubic and face-centered-cubic Bravais lattices as well as the $d$-dimensional generalizations of the diamond and kagom{é} (or pyrochlore) non-Bravais lattices. These analytical estimates are used to assess available simulation results across dimensions (up through $d=13$ in some cases). It is noteworthy that the tightest lower bound provides reasonable estimates of $p_c$ in relatively low dimensions and becomes increasingly accurate as $d$ grows. We also derive high-dimensional asymptotic expansions for $p_c$ for the ten percolation problems and compare them to the Bethe-lattice approximation. Finally, we remark on the radius of convergence of the series expansion of $S$ in powers of $p$ as the dimension grows.

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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