arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1402.4656cond-mat.dis-nncond-mat.stat-mech
收藏

具有极长程连通和节点稀释的渗流系统

A percolation system with extremely long range connections and node dilution

M. L. de Almeida, E. L. Albuquerque, U. L. Fulco, M. Serva

摘要:

我们研究了同时具有位点和键稀释的线性链上的非常远程的键渗透问题。非常长的距离意味着在距离$r_{ij}$处的两个被占用的站点$i,j$之间的连接的概率$p_{ij}$按照幂律衰减,即当$ 0 \le α< 1$时为$p_{ij} = ρ/[r_{ij}^αN^{1-α}]$,当$α= 1$时为$p_{ij} = ρ/[r_{ij} \ln(N)]$。位点稀释是指位点的占用概率为$0 < p_s \le 1$。该模型的行为是由于长程连通性(增强渗流)和场地稀释(削弱渗流)之间的竞争造成的。$α=0$与$p_s =1 $的情况是众所周知的,是精确可解的平均场模型。数值研究了不同$α$、$p_s$和$ρ$值下的渗流序参量$P_\infty$。我们表明,在范围内的$ 0 \le α\le 1$和$0 < p_s \le 1$的渗流序参数$P_\infty$只取决于平均连接$γ$的网站,这可以明确计算的三个参数$α$,$p_s$和$ρ$。

英文摘要:

We study the very long-range bond-percolation problem on a linear chain with both sites and bonds dilution. Very long range means that the probability $p_{ij}$ for a connection between two occupied sites $i,j$ at a distance $r_{ij}$ decays as a power law, i.e. $p_{ij} = ρ/[r_{ij}^αN^{1-α}]$ when $ 0 \le α< 1$, and $p_{ij} = ρ/[r_{ij} \ln(N)]$ when $α= 1$. Site dilution means that the occupancy probability of a site is $0 < p_s \le 1$. The behavior of this model results from the competition between long-range connectivity, which enhances the percolation, and site dilution, which weakens percolation. The case $α=0$ with $p_s =1 $ is well-known, being the exactly solvable mean-field model. The percolation order parameter $P_\infty$ is investigated numerically for different values of $α$, $p_s$ and $ρ$. We show that in the ranges $ 0 \le α\le 1$ and $0 < p_s \le 1$ the percolation order parameter $P_\infty$ depends only on the average connectivity $γ$ of sites, which can be explicitly computed in terms of the three parameters $α$, $p_s$ and $ρ$.

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。

↑