Bacterial diffusion in disordered media, by forgetting the media
arXiv:2311.10612 · doi:10.1073/pnas.2407313122
Abstract
We study bacterial diffusion in disordered porous media. Interactions with obstacles, at unknown locations, make this problem challenging. We approach it by abstracting the environment to cell states with memoryless transitions. With this, we derive an effective diffusivity that agrees well with simulations in explicit geometries. The diffusivity is non-monotonic, and we solve the optimal run length. We also find a rescaling that causes all of the theory and simulations to collapse. Our results indicate that a small set of microscopic features captures bacterial diffusion in disordered media.
arXiv comment5 pages, 4 figures. SI included as an ancillary PDF file
References in corpus (23)
- Active Particles in Complex and Crowded Environments
- Hydrodynamic attraction of swimming microorganisms by surfaces
- Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
- Lévy walks
- Bacterial hydrodynamics
- Bacterial hopping and trapping in porous media
- Hydrodynamic capture of microswimmers into sphere-bound orbits
- Geometric capture and escape of a microswimmer colliding with an obstacle
- Active Matter Transport and Jamming on Disordered Landscapes
- E. coli chemotaxis is information-limited
- The topography of the environment alters the optimal search strategy for active particles
- A Geometric Criterion for the Optimal Spreading of Active Polymers in Porous Media
- Non-genetic diversity modulates population performance
- Optimized Diffusion of Run-and-Tumble Particles in Crowded Environments
- The Localization Transition of the Two-Dimensional Lorentz Model
- Dynamics of active filaments in porous media
- Diffusion in spatially varying porous media
- Enhanced propagation of motile bacteria on surfaces due to forward scattering
- Cage Length Controls the Non-Monotonic Dynamics of Active Glassy Matter
- Dispersion of motile bacteria in a porous medium
- Shape matters: A Brownian microswimmer in a channel
- Microscopic theory for the diffusion of an active particle in a crowded environment
- Fluctuating landscapes and heavy tails in animal behavior