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arXiv 0901.0788cond-mat.dis-nn
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随机连通图上过程的动力学副本分析II:稀释Ising铁磁体Griffiths相的动力学

Dynamical replica analysis of processes on finitely connected random graphs II: Dynamics in the Griffiths phase of the diluted Ising ferromagnet

A. Mozeika, A. C. C. Coolen

摘要:

本文研究了连通随机图上具有随机键的Ising自旋模型的Glauber动力学。我们推广了最近的动力学副本理论与预测的联合自旋场分布的演变,包括随机图与任意度分布。将该理论应用于随机稀释Bethe晶格上的Ising铁磁体,研究了磁化强度和内能的演化。它预测了一个显着放缓的流动在格里菲斯阶段,它建议进一步的动力学转变在较低的温度内的格里菲斯阶段,它是定量验证的蒙特卡罗模拟的结果。

英文摘要:

We study the Glauber dynamics of Ising spin models with random bonds, on finitely connected random graphs. We generalize a recent dynamical replica theory with which to predict the evolution of the joint spin-field distribution, to include random graphs with arbitrary degree distributions. The theory is applied to Ising ferromagnets on randomly diluted Bethe lattices, where we study the evolution of the magnetization and the internal energy. It predicts a prominent slowing down of the flow in the Griffiths phase, it suggests a further dynamical transition at lower temperatures within the Griffiths phase, and it is verified quantitatively by the results of Monte Carlo simulations.

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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