Nonergodicity of reset geometric Brownian motion.

Vinod, Deepak; Cherstvy, Andrey G; Wang, Wei; Metzler, Ralf; Sokolov, Igor M · Phys Rev E · 2022

basic_science · Level V

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Abstract

We derive. the ensemble- and time-averaged mean-squared displacements (MSD, TAMSD) for Poisson-reset geometric Brownian motion (GBM), in agreement with simulations. We find MSD and TAMSD saturation for frequent resetting, quantify the spread of TAMSDs via the ergodicity-breaking parameter and compute distributions of prices. General MSD-TAMSD nonequivalence proves reset GBM nonergodic.