Document type
ArticleVersion
Published versionPublication date
Publication license
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/151830
Rectification and Non-Gaussian Diffusion in Heterogeneous Media
Journal Title
Director/Tutor
Additional contribution
Journal ISSN
Volume Title
Abstract
We show that when Brownian motion takes place in a heterogeneous medium, the presence of local forces and transport coefficients leads to deviations from a Gaussian probability distribution that make that the ratio between forward and backward probabilities depend on the nature of the host medium, on local forces, and also on time. We have applied our results to two situations: diffusion in a disordered medium, and diffusion in a confined system. For such scenarios, we have shown that our theoretical predictions are in very good agreement with numerical results. Moreover, we have shown that the deviations from the Gaussian solution lead to the onset of rectification. Our predictions could be used to detect the presence of local forces and to characterize the intrinsic short-scale properties of the host medium a problem of current interest in the study of micro- and nano-systems.
Related resource
Subject
Subject (English)
Citation
Citation
MALGARETTI, Paolo, PAGONABARRAGA MORA, Ignacio and RUBÍ CAPACETI, José Miguel. Rectification and Non-Gaussian Diffusion in Heterogeneous Media. Entropy. 2016. Vol. 18, num. 11, pags. 394. ISSN 1099-4300. [consulted: 8 of October of 2026]. Available at: https://hdl.handle.net/2445/151830