Dynamics of bacteria scanning a porous environment
Abstract
It has recently been reported that bacteria, such as E.coli and P. putida, perform distinct modes of motion when placed in porous media as compared to dilute regions or free space. This has led us to suggest an efficient strategy for active particles in a disordered environment: reorientations are suppressed in locally dilute regions and intensified in locally dense ones. Thereby the local geometry determines the optimal path of the active agent and substantially accelerates the dynamics for up to two orders of magnitude. We observe a non-monotonic behavior of the diffusion coefficient in dependence on the tumbling rate and identify a localisation transition, either by increasing the density of obstacles or by decreasing the reorientation rate.
Keywords
Cite
@article{arxiv.2112.00533,
title = {Dynamics of bacteria scanning a porous environment},
author = {Ehsan Irani and Zahra Mokhtari and Annette Zippelius},
journal= {arXiv preprint arXiv:2112.00533},
year = {2022}
}
Comments
5 pages, 5 figure. Movies can be accessed via: phi_obs0.4-sigmoid.webm: see https://nxcloud.omid.land/s/iDkDYGHwjczpZg9 phi_obs0.6-sigmoid.webm: see https://nxcloud.omid.land/s/eJQo8btyWQZ9nrA phi_obs0.4-uniform.webm: see https://nxcloud.omid.land/s/Fnp7cpGnm8JYqxX phi_obs0.6-uniform.webm: see https://nxcloud.omid.land/s/cBMgtL5QfYiXWZD