Nonergodicity of confined superdiffusive fractional Brownian motion

被引：8

作者：

Liang, Yingjie ^{[1
,2
]}

Wang, Wei ^{[2
]}

Metzler, Ralf ^{[2
,3
]}

Cherstvy, Andrey G. ^{[2
]}

机构：

[1] Hohai Univ, Coll Mech & Mat, Nanjing 211100, Peoples R China

[2] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany

[3] Asia Pacific Ctr Theoret Phys, Pohang 37673, South Korea

来源：

PHYSICAL REVIEW E | 2023年 / 108卷 / 05期

关键词：

27;

D O I：

10.1103/PhysRevE.108.L052101

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Using stochastic simulations supported by analytics we determine the degree of nonergodicity of box-confined fractional Brownian motion for both sub-and superdiffusive Hurst exponents H. At H > 1/2 the nonequivalence of the ensemble-and time-averaged mean-squared displacements (TAMSDs) is found to be most pronounced (with a giant spread of individual TAMSDs at H -> 1), with two distinct short-lag-time TAMSD exponents.

引用

页数：5

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