Large deviations of convex hulls of self-avoiding random walks.

Large deviations of convex hulls of self-avoiding random walks.
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自回避随机游走的凸包偏差较大

DOI:
10.1103/physreve.97.062159
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发表时间:
2018
期刊:
Physical review. E
影响因子:
--
通讯作者:
S.N. Majumdar
S.N. Majumdar
中科院分区:
--
文献类型:
--
作者:
H. Schawe;A.K. Hartmann;S.N. Majumdar

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随机粒子运动的全局图像由访问点的凸船体给出。我们得到了选择的三种类型的自避免随机游动,即经典的自避免行走,智能动力学的自避免行走,和循环擦除随机行走的凸包的体积和表面的概率分布。为了获得对测量的随机量的全面描述,我们应用了复杂的大偏差技术,这使我们能够获得大范围支持的分布,其概率远小于。我们给出了一个近似的封闭形式的所谓的大偏差率functionwhich概括以上的上临界尺寸到以前研究的情况下的标准随机游走。此外,我们还显示了两个观测值之间的相关性,在非典型的大或小的值的限制。
A global picture of a random particle movement is given by the convex hull of the visited points. We obtained numerically the probability distributions of the volume and surface of the convex hulls of a selection of three types of self-avoiding random walks, namely, the classical self-avoiding walk, the smart-kinetic self-avoiding walk, and the loop-erased random walk. To obtain a comprehensive description of the measured random quantities, we applied sophisticated large-deviation techniques, which allowed us to obtain the distributions over a large range of support down to probabilities far smaller than. We give an approximate closed form of the so-called large-deviation rate functionwhich generalizes above the upper critical dimension to the previously studied case of the standard random walk. Further, we show correlations between the two observables also in the limits of atypical large or small values.
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