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arXiv 1306.4817cond-mat.stat-mech
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纤维束模型弛豫时间的标度形式

Scaling forms for Relaxation Times of the Fiber Bundle model

Chandreyee Roy, Sumanta Kundu, S. S. Manna

摘要:

使用广泛的数值分析的纤维束模型与相等的负载分配动力学,我们研究了有限尺寸的缩放形式的松弛时间对每个纤维施加的负载从临界点的偏差。我们最关键的结果是,我们没有发现任何$\ln (N)$依赖的平均弛豫时间$\langle T(σ,N) \rangle$在预临界状态。其它结果是:(i)对于尺寸为$N$的管束,临界载荷$σ_c(N)$以$σ_c(N) = σ_c(\infty) + AN^{-1/ν}$的形式接近其渐近值$σ_c(\infty)$。(ii)就在临界点处,平均弛豫时间$\langle T(σ_c(N),N) \rangle$与束大小$N$成比例:$\langle T(σ_c(N),N) \rangle \sim N^η$,并且该行为在临界点周围的大小为$|Δσ| \sim N^{-ζ}$的小窗口内保持有效。(iii)当$1/N < |Δσ| < 100N^{-ζ}$时,有限大小的缩放采用以下形式:$\langle T(σ,N) \rangle / N^η \sim {\cal G}[\{σ_c(N)-σ\}N^ζ]$,使得在$N \to \infty$的极限中,具有$\langle T(σ) \rangle \sim (σ- σ_c)^{-τ}$。我们的数值估计的高精度使我们能够验证$ν= 3/2$,猜想$η= 1/3$,$ζ= 2/3$,因此$τ= 1/2$。

英文摘要:

Using extensive numerical analysis of the Fiber Bundle Model with Equal Load Sharing dynamics we studied the finite-size scaling forms of the relaxation times against the deviations of applied load per fiber from the critical point. Our most crucial result is we have not found any $\ln (N)$ dependence of the average relaxation time $\langle T(σ,N) \rangle$ in the precritical state. The other results are: (i) The critical load $σ_c(N)$ for the bundle of size $N$ approaches its asymptotic value $σ_c(\infty)$ as $σ_c(N) = σ_c(\infty) + AN^{-1/ν}$. (ii) Right at the critical point the average relaxation time $\langle T(σ_c(N),N) \rangle$ scales with the bundle size $N$ as: $\langle T(σ_c(N),N) \rangle \sim N^η$ and this behavior remains valid within a small window of size $|Δσ| \sim N^{-ζ}$ around the critical point. (iii) When $1/N < |Δσ| < 100N^{-ζ}$ the finite-size scaling takes the form: $\langle T(σ,N) \rangle / N^η \sim {\cal G}[\{σ_c(N)-σ\}N^ζ]$ so that in the limit of $N \to \infty$ one has $\langle T(σ) \rangle \sim (σ- σ_c)^{-τ}$. The high precision of our numerical estimates led us to verify that $ν= 3/2$, conjecture that $η= 1/3$, $ζ= 2/3$ and therefore $τ= 1/2$.

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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