arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.19035cond-mat.stat-mech
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格点极限下非对称 Barabási-Albert 模型的结构性质

Structural Properties of the Asymmetric Barabási-Albert Model in the Lattice Limit

Kazuaki Nakayama, Masato Hisakado, Shintaro Mori

AI总结:

本文研究非对称 BA 模型在格点极限附近的结构性质,推导了特定参数下的精确度分布并建立微扰展开,同时证明聚类系数趋于零,表明模型不具备小世界特性。

摘要:

非对称 BA 模型通过引入参数 $ω$ 扩展了 Barabási-Albert 无标度网络模型。随着 $ω$ 变化,模型经历不同的网络结构:在 $ω= -1$ 时为扩展格点,在 $ω= 0$ 时为随机图,在 $ω= 1$ 时为原始无标度网络。我们推导了 $ω= -r/(r+k)$(其中 $k \in \{0,1,\cdots\}$)时的精确度分布,并在这些 $ω$ 值附近建立了微扰展开。此外,我们证明当 $ω= -1 + \varepsilon$ 时,聚类系数按 $\ln t / \sqrt{\varepsilon} t$ 标度变化,并随着 $t \to \infty$ 趋近于零,从而证实其不具备小世界性质。

英文摘要:

The Asymmetric BA model extends the Barabási-Albert scale-free network model by introducing a parameter $ω$. As $ω$ varies, the model transitions through different network structures: an extended lattice at $ω= -1$, a random graph at $ω= 0$, and the original scale-free network at $ω= 1$. We derive the exact degree distribution for $ω= -r/(r+k)$, where $k \in \{0,1,\cdots\}$, and develop a perturbative expansion around these values of $ω$. Additionally, we show that for $ω= -1 + \varepsilon$, the clustering coefficient scales as $\ln t / \sqrt{\varepsilon} t$ and approaches zero as $t \to \infty$, confirming the absence of small-world properties.

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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