Disorder-Induced Anomalous Mobility Enhancement in Confined Geometries
Abstract
Strong, scale-free disorder disrupts typical transport properties like the Stokes-Einstein relation and linear response, leading to anomalous, non-diffusive motion observed in amorphous materials, glasses, living cells, and other systems. Our study reveals that the combination of scale-free quenched disorder and geometrical constraints induces unconventional single particle mobility behavior. Specifically, in a -dimensional channel with width , under external drive, tighter geometrical constraints (smaller ) enhance mobility. We derive an explicit form of the response to an external force by utilizing the double-subordination approach for the quenched trap model. The observed mobility enhancement occurs in the low-temperature regime where the distribution of localization times is scale-free.
Keywords
Cite
@article{arxiv.2403.01665,
title = {Disorder-Induced Anomalous Mobility Enhancement in Confined Geometries},
author = {Dan Shafir and Stanislav Burov},
journal= {arXiv preprint arXiv:2403.01665},
year = {2024}
}