Run-and-tumble particles in speckle fields

Abstract

The random energy landscapes developed by speckle fields can be used to confine and manipulate a large number of micro-particles with a single laser beam. By means of molecular dynamics simulations, we investigate the static and dynamic properties of an active suspension of swimming bacteria embedded into speckle patterns. Looking at the correlation of the density fluctuations and the equilibrium density profiles, we observe a crossover phenomenon when the forces exerted by the speckles are equal to the bacteria's propulsion.

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• Active Particles in Complex and Crowded Environments
• Probing the spatiotemporal dynamics of catalytic Janus particles with single-particle tracking and differential dynamic microscopy
• Exact stationary state of a run-and-tumble particle with three internal states in a harmonic trap
• Light, Matter, Action: Shining light on active matter
• Active Brownian and inertial particles in disordered environments: short-time expansion of the mean-square displacement
• Self-Sustained Density Oscillations of Swimming Bacteria Confined in Microchambers
• Narrow-escape time and sorting of active particles in circular domains
• Fractal aggregation of active particles
• Ramifications of disorder on active particles in one dimension
• Dewetting and Spreading Transitions for Active Matter on Random Pinning Substrates
• Dynamics of fluids in quenched-random potential energy landscapes: a mode-coupling theory approach