论文标题
在排斥活性颗粒中的自组织临界共存阶段
Self-Organized Critical Coexistence Phase in Repulsive Active Particles
论文作者
论文摘要
我们在两种通过成对排斥相互作用的活动粒子模型中重新审视运动诱导的相位分离。我们表明，所得密度相结合的气泡分布在典型的截止量表上。在足够大的系统尺寸和/或全球密度下，所有气体都可以包含在气泡内部，此时，系统将通过有限的截止型气泡刻度分离系统。我们观察到秩序是异常的，具有不同的动力学，以使其致密相位和气泡的浓缩。这种现象学是由“减少的气泡模型”复制的，该模型实现了Tjhung等人提出的反向Ostwald成熟的基本思想。 [物理。修订版X 8，031080（2018）]。
We revisit motility-induced phase separation in two models of active particles interacting by pairwise repulsion. We show that the resulting dense phase contains gas bubbles distributed algebraically up to a typically large cutoff scale. At large enough system size and/or global density, all the gas may be contained inside the bubbles, at which point the system is microphase-separated with a finite cut-off bubble scale. We observe that the ordering is anomalous, with different dynamics for the coarsening of the dense phase and of the gas bubbles. This phenomenology is reproduced by a "reduced bubble model" that implements the basic idea of reverse Ostwald ripening put forward in Tjhung et al. [Phys. Rev. X 8, 031080 (2018)].
