Macroscopic traveling packet and soliton states of quasi-one-dimensional flocks

作者：Guttenberg Nicholas^*; Toner John; Tu Yuhai

来源：Physical Review E, 2014, 89(5): 052711.

DOI：10.1103/PhysRevE.89.052711

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.

• 出版日期2014-5-16
• 单位IBM