摘要翻译:
损伤扩展法(DS)为获得二维Ising模型的热力学和稳定性的分析结果提供了一个有用的工具,但它既有结果的模糊性,也有计算量大的问题。在本文中,我们提出了一种替代方法,所谓的自重叠法,基于研究相关函数在随后的时间步长上测量,随着系统向它的平衡发展,我们提出了一种新的方法,即所谓的自重叠法。将马尔可夫近似和平均场近似应用于2D Ising系统,我们得到了热力学的解析和数值结果,与预期的行为一致。我们还提供了一些关于系统稳定性的解析结果。因为只需要研究系统的单个副本,所以这种方法似乎没有困扰DS的模糊性。它似乎在数值上更有效,在分析上更简单。
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英文标题:
《Self-overlap as a method of analysis in Ising models》
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作者:
A. Ferrera, B. Luque, L. Lacasa, E. Valero
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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英文摘要:
The damage spreading method (DS) provided a useful tool to obtain analytical results of the thermodynamics and stability of the 2D Ising model --amongst many others--, but it suffered both from ambiguities in its results and from large computational costs. In this paper we propose an alternative method, the so called self-overlap method, based on the study of correlation functions measured at subsequent time steps as the system evolves towards its equilibrium. Applying markovian and mean field approximations to a 2D Ising system we obtain both analytical and numerical results on the thermodynamics that agree with the expected behavior. We also provide some analytical results on the stability of the system. Since only a single replica of the system needs to be studied, this method would seem to be free from the ambiguities that afflicted DS. It also seems to be numerically more efficient and analytically simpler.
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PDF链接:
https://arxiv.org/pdf/705.1913