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arXiv 0709.3228cond-mat.stat-mechcond-mat.dis-nnhep-thmath-phmath.MP
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二维无序伊辛模型的相序动力学

Phase-ordering kinetics of two-dimensional disordered Ising models

Florian Baumann, Malte Henkel, Michel Pleimling

摘要:

利用蒙特卡罗模拟研究了具有均匀无序的铁磁二维伊辛模型的相序动力学。考虑到有限的时间校正标度,简单的老化行为中观察到的两个时间的响应和衰减。动力学指数z和标度函数的形式仅取决于比值eps/T,其中eps描述了无序分布的宽度。对于响应和相关的两次标度函数,局部标度不变性的预测推广到z<> 2与数值数据的一致性提供了广义伽利略不变性的直接检验。

英文摘要:

The phase-ordering kinetics of the ferromagnetic two-dimensional Ising model with uniform disorder is investigated by intensive Monte Carlo simulations. Taking into account finite-time corrections to scaling, simple ageing behaviour is observed in the two-time responses and correlators. The dynamical exponent z and the form of the scaling functions only depend on the ratio eps/T, where eps describes the width of the distribution of the disorder. The agreement of the predictions of local scale-invariance generalised to z<> 2 for the two-time scaling functions of response and correlations with the numerical data provides a direct test of generalised Galilei-invariance.

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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