Molina-García D., Pham T. M., Paradisi P., Manzo C., Pagnini G.
generalized grey Bronian motion (ggBm) 60G22 60J60 Anomalous diffusion 26A33 Statistical Mechanics (cond-mat.stat-mech) FOS: Physical sciences non-Gaussian fractional kinetics Signal Processing Brownian motion Heterogeneity Time Series Analysis Condensed Matter - Statistical Mechanics anomalous diffusion stochastic processes biophysics
We present a modeling approach for diffusion in a complex medium characterized by a random length scale. The resulting stochastic process shows subdiffusion with a behavior in qualitative agreement with single-particle tracking experiments in living cells, such as ergodicity breaking, p variation, and aging. In particular, this approach recapitulates characteristic features previously described in part by the fractional Brownian motion and in part by the continuous-time random walk. Moreover, for a proper distribution of the length scale, a single parameter controls the ergodic-to-nonergodic transition and, remarkably, also drives the transition of the diffusion equation of the process from nonfractional to fractional, thus demonstrating that fractional kinetics emerges from ergodicity breaking.
Source: Physical review. E (Print) 94 (2016). doi:10.1103/PhysRevE.94.052147
Publisher: American Physical Society, Ridge, NY, Stati Uniti d'America
@article{oai:it.cnr:prodotti:401217, title = {Fractional kinetics emerging from ergodicity breaking in random media}, author = {Molina-García D. and Pham T. M. and Paradisi P. and Manzo C. and Pagnini G.}, publisher = {American Physical Society, Ridge, NY, Stati Uniti d'America}, doi = {10.1103/physreve.94.052147 and 10.48550/arxiv.1508.01361}, journal = {Physical review. E (Print)}, volume = {94}, year = {2016} }
10.1103/physreve.94.052147
10.48550/arxiv.1508.01361
arXiv.org e-Print Archive
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Recolector de Ciencia Abierta, RECOLECTA
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