Nonergodicity of confined superdiffusive fractional Brownian motion.
basic_science · Level V
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- Record sourced from PubMed, PMID 38115422.
- Also identified by DOI 10.1103/PhysRevE.108.L052101.
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Abstract
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.