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Infinite volume extrapolation in the one-dimensional bond diluted Levy spin-glass model near its lower critical dimension

机译:在一维债券中稀释Levy的无限量外推   旋转玻璃模型靠近其下临界尺寸

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摘要

We revisited, by means of numerical simulations, the one dimensional bonddiluted Levy Ising spin glasses outside the limit of validity of mean fieldtheories. In these models the probability that two spins at distance $r$interact (via a disordered interactions, $J_{ij}=\pm 1$) decays as $r^{-\rho}$.We have estimated, using finite size scaling techniques, the infinite volumecorrelation length and spin glass susceptibility for $\rho=5/3$ and $\rho=9/5$.We have obtained strong evidence for divergences of the previous observables ata non zero critical temperature. We discuss the behavior of the criticalexponents, especially when approaching the value $\rho=2$, corresponding to acritical threshold beyond which the model has no phase transition. Finally, wenumerically study the model right at the threshold value $\rho=2$.
机译:通过数值模拟,我们重新研究了在平均场论有效性范围之外的一维键稀释的Levy Ising自旋玻璃。在这些模型中,距离为$ r $的两个自旋(通过无序的相互作用,$ J_ {ij} = \ pm 1 $)相互作用的概率随着$ r ^ {-\ rho} $的变化而衰减。我们使用有限大小进行了估算缩放技术,无穷大的体积相关长度和$ \ rho = 5/3 $和$ \ rho = 9/5 $的自旋玻璃磁化率。我们讨论了临界指数的行为,特别是在接近值$ \ rho = 2 $时,该行为对应于临界阈值,超过该阈值模型就没有相变。最后,对阈值$ \ rho = 2 $进行数值研究。

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