标题： 自推进粒子流中的动态自我调节 显示英文标题

标题： Dynamical Self-regulation in Self-propelled Particle Flows

摘要： 我们研究了一个二维的过阻尼自推进粒子的连续模型，该模型具有对齐相互作用。 通过结合分析和数值工作，我们绘制了通用参数的相图。 我们发现，在参数空间的不同区域，系统会自组织成两种稳定的结构：在低密度无序背景中移动的有序群体的孤立波，以及静止的星状结构。 流动的自我调节特性导致相分离，这在这一类系统中很常见，并控制着孤立波的形成。 自推进和相关的主动对流在星状结构的形成中起着关键作用。 我们工作的新结果是一个相图，以统一的方式展示了这些不同的区域。 显示英文摘要

摘要： We study a continuum model of overdamped self-propelled particles with an aligning interaction in two dimensions. By combining analytical and numerical work, we map out the phase diagram for generic parameters. We find that the system self-organizes into two robust structures in different regions of parameter space: solitary waves of ordered swarms moving through a low density disordered background, and stationary asters. The self-regulating nature of the flow yields phase separation, ubiquitous in this class of systems, and controls the formation of solitary waves. Self-propulsion and the associated active convection play a crucial role in aster formation. A new result of our work is a phase diagram that displays these different regimes in a unified manner.