J.K. Gimzewski, T.A. Jung, et al.
Surface Science
Using a continuum model for inhomogeneous flocks, we show that a finite but arbitrarily large moving "packet" of active particles (e.g., moving creatures) can form in a background of a lower density disordered phase of these particles, like a liquid drop surrounded by vapor. The "vapor density" of the disordered background can be made arbitrarily low. We find three basic types of quasi-one-dimensional states: "longitudinal", "transverse", and "oblique" states, with their internal velocity fields, respectively, parallel, perpendicular, and oblique to the interface. The transitions between these states are also studied. © 2014 American Physical Society.
J.K. Gimzewski, T.A. Jung, et al.
Surface Science
P. Alnot, D.J. Auerbach, et al.
Surface Science
Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters
Lawrence Suchow, Norman R. Stemple
JES