Invariants of motion with stochastic resetting and space-time coupled returns

A Pal, Ł Kuśmierz, S Reuveni - New Journal of Physics, 2019 - iopscience.iop.org
Motion under stochastic resetting serves to model a myriad of processes in physics and
beyond, but in most cases studied to date resetting to the origin was assumed to take zero …

Fluctuation analysis of time-averaged mean-square displacement for the Langevin equation with time-dependent and fluctuating diffusivity

T Uneyama, T Miyaguchi, T Akimoto - Physical Review E, 2015 - APS
The mean-square displacement (MSD) is widely utilized to study the dynamical properties of
stochastic processes. The time-averaged MSD (TAMSD) provides some information on the …

Biased continuous-time random walks for ordinary and equilibrium cases: facilitation of diffusion, ergodicity breaking and ageing

R Hou, AG Cherstvy, R Metzler… - Physical Chemistry …, 2018 - pubs.rsc.org
We examine renewal processes with power-law waiting time distributions (WTDs) and non-
zero drift via computing analytically and by computer simulations their ensemble and time …

Moses, Noah and Joseph effects in Lévy walks

E Aghion, PG Meyer, V Adlakha, H Kantz… - New Journal of …, 2021 - iopscience.iop.org
We study a method for detecting the origins of anomalous diffusion, when it is observed in
an ensemble of times-series, generated experimentally or numerically, without having …

Transitions in the ergodicity of subrecoil-laser-cooled gases

E Barkai, G Radons, T Akimoto - Physical review letters, 2021 - APS
With subrecoil-laser-cooled atoms, one may reach nanokelvin temperatures while the
ergodic properties of these systems do not follow usual statistical laws. Instead, due to an …

Asymptotic densities of ballistic Lévy walks

D Froemberg, M Schmiedeberg, E Barkai, V Zaburdaev - Physical Review E, 2015 - APS
We propose an analytical method to determine the shape of density profiles in the
asymptotic long-time limit for a broad class of coupled continuous-time random walks which …

Infinite invariant density in a semi-Markov process with continuous state variables

T Akimoto, E Barkai, G Radons - Physical Review E, 2020 - APS
We report on a fundamental role of a non-normalized formal steady state, ie, an infinite
invariant density, in a semi-Markov process where the state is determined by the interevent …

Exact Results for the Nonergodicity of -Dimensional Generalized Lévy Walks

T Albers, G Radons - Physical review letters, 2018 - APS
We provide analytical results for the ensemble-averaged and time-averaged squared
displacement, and the randomness of the latter, in the full two-dimensional parameter space …

Distributional behaviors of time-averaged observables in the Langevin equation with fluctuating diffusivity: Normal diffusion but anomalous fluctuations

T Akimoto, E Yamamoto - Physical Review E, 2016 - APS
We consider the Langevin equation with dichotomously fluctuating diffusivity, where the
diffusion coefficient changes dichotomously over time, in order to study fluctuations of time …

Scale-invariant Green-Kubo relation for time-averaged diffusivity

P Meyer, E Barkai, H Kantz - Physical Review E, 2017 - APS
In recent years it was shown both theoretically and experimentally that in certain systems
exhibiting anomalous diffusion the time-and ensemble-averaged mean-squared …