论文标题
从羊群到密度无序的极性活性物质的玻璃感
From flocking to glassiness in dense disordered polar Active Matter
论文作者
论文摘要
生物组织或细菌菌落等活物质是不同大小的异质实体的集合，能够自动运动，并且通常能够合作。如此程度的复杂性为大规模的集体运动带来了。但是，几何挫败感，自主运动和合作行动趋势之间的竞争如何在大规模行为上影响大规模行为。我们在主动物质模型中实现了这三种成分，并表明该系统在形成迁移模式时可以按乐队排列或发展远程顺序，具体取决于系统的密度。我们还表明，活性材料经历了通常仅引起集体迁移运动的比对相互作用触发的恢复玻璃转变。最后，我们观察到极性阶会破坏主动相分离，从而产生同质的，无序的移动构型。
Living materials such as biological tissues or bacterial colonies are collections of heterogeneous entities of different sizes, capable of autonomous motion, and often capable of cooperating. Such a degree of complexity brings to collective motion on large scales. However, how the competition between geometrical frustration, autonomous motion, and the tendency to move cooperatively impact large-scale behavior remains an open question. We implement those three ingredients in a model of active matter and show that the system, in forming migratory patterns, can arrange in bands or develop long-range order, depending on the density of the system. We also show that the active material undergoes a reentrant glass transition triggered by the alignment interaction that typically causes only collective migratory motion. Finally, we observe that polar order destroys active phase separation, producing homogeneous, disordered moving configurations.
