1/fNoise from Glauber Dynamics: Self-Consistent Interaction and Temperature Dependent Correlations

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1/fNoise from Glauber Dynamics: Self-Consistent Interaction and Temperature Dependent Correlations

机译：Glauber Dynamics的1 / f噪声：自洽相互作用和温度相关性

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Low frequency flicker noise has been argued to occur in spatially extended metastable systems near a critical point (Bak et al., 1987). An Ising-Glauber model based method is suggested here to systematically obtain temperature dependentnth-order correlation functions forNarbitrary interacting two-level systems (TLSs). This model is fully consistent with existing methods to calculate1/fnoise spectra from TLSs and complements them. However, with as such noa prioriassumptions on the typical log normal distribution of fluctuation rates, it is shown that1/fαnoise manifests in two different cases: first in the thermodynamic limit on a 2D lattice with long range antiferromagnetic interactions at low temperatures and second in the case of a statistical ensemble of finite-sized spin clusters representing disorder, but where each cluster is ordered due to ferromagnetic interactions.

机译：有人认为低频闪烁噪声会在临界点附近的空间扩展的亚稳态系统中发生（Bak等，1987）。本文提出一种基于Ising-Glauber模型的方法，以系统地获得任意相互作用的两层系统（TLS）的温度相关的n阶相关函数。该模型与从TLS计算1 /噪声谱的现有方法完全一致，并对它们进行了补充。然而，通过对典型的波动率对数正态分布进行noa先验假设，可以证明1 /fα噪声在两种不同情况下出现：首先是在二维晶格的热力学极限中，在低温下具有长距离反铁磁相互作用，其次是表示无序的有限大小自旋簇的统计集合的情况，但是由于铁磁相互作用，每个簇是有序的。

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《Advances in condensed matter physics》 |2015年第11期|共10页
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1/fNoise from Glauber Dynamics: Self-Consistent Interaction and Temperature Dependent Correlations

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