Active Brownian Particles Escaping a Channel in Single File

Abstract

Active particles may happen to be confined in channels so narrow that they cannot overtake each other (Single File conditions). This interesting situation reveals nontrivial physical features as a consequence of the strong inter-particle correlations developed in collective rearrangements. We consider a minimal model for active Brownian particles with the aim of studying the modifications introduced by activity with respect to the classical (passive) Single File picture. Depending on whether their motion is dominated by translational or rotational diffusion, we find that active Brownian particles in Single File may arrange into clusters which are continuously merging and splitting ({\it active clusters}) or merely reproduce passive-motion paradigms, respectively. We show that activity convey to self-propelled particles a strategic advantage for trespassing narrow channels against external biases (e.g., the gravitational field).

12 pages, 6 figures (main text)

References in corpus (10)

• Self-motile colloidal particles: from directed propulsion to random walk
• Motility-Induced Phase Separation
• Meso-scale turbulence in living fluids
• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
• Diffusive transport without detailed balance in motile bacteria: Does microbiology need statistical physics?
• Non-equilibrium clustering of self-propelled rods
• Sedimentation, trapping, and rectification of dilute bacteria
• Motility-sorting of self-propelled particles in micro-channels
• How to Track Protists in Three Dimensions

Cited by in corpus (6)

• Exact stationary state of a run-and-tumble particle with three internal states in a harmonic trap
• Single-file escape of colloidal particles from microfluidic channels
• Coarsening and clustering in run-and-tumble dynamics with short-range exclusion
• Time-dependent properties of interacting active matter: dynamical behavior of one-dimensional systems of self-propelled particles
• Hydrodynamic interactions dominate the structure of active swimmers' pair distribution functions
• Active Matter in Lateral Parabolic Confinement: From Subdiffusion to Superdiffusion