Ergodicity recovery of random walk in heterogeneous disordered media  

作　　者：Liang Luo Ming Yi 罗亮;易鸣(Department of Physics,Huazhong Agricultural University,Wuhan 430070,China;Institute of Applied Physics,Huazhong Agricultural University,Wuhan 430070,China;School of Mathematics and Physics,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]Department of Physics,Huazhong Agricultural University,Wuhan 430070,China [2]Institute of Applied Physics,Huazhong Agricultural University,Wuhan 430070,China [3]School of Mathematics and Physics,China University of Geosciences,Wuhan 430074,China

出　　处：《Chinese Physics B》2020年第5期165-173,共9页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grants Nos.11705064,11675060,and 91730301).

摘　　要：Significant and persistent trajectory-to-trajectory variance are commonly observed in particle tracking experiments,which have become a major challenge for the experimental data analysis.In this theoretical paper we investigate the ergodicity recovery behavior,which helps clarify the origin and the convergence of trajectory-to-trajectory fluctuation in various heterogeneous disordered media.The concepts of self-averaging and ergodicity are revisited in the context of trajectory analysis.The slow ergodicity recovery and the non-Gaussian diffusion in the annealed disordered media are shown as the consequences of the central limit theorem in different situations.The strange ergodicity recovery behavior is reported in the quenched disordered case,which arises from a localization mechanism.The first-passage approach is introduced to the ergodicity analysis for this case,of which the central limit theorem can be employed and the ergodicity is recovered in the length scale of diffusivity correlation.

关 键 词：anomalous diffusion random walk disordered systems non-Gaussian diffusion 

分 类 号：O177.99[理学—数学]