Swarming Bottom Feeders: Flocking at Solid-Liquid Interfaces
Swarming Bottom Feeders: Flocking at Solid-Liquid Interfaces
We present the hydrodynamic theory of coherent collective motion ("flocking") at a solid-liquid interface, and many of its predictions for experiment. We find that such systems are stable, and have long-range orientational order, over a wide range of parameters. When stable, these systems exhibit "giant number fluctuations," which grow as …