论文标题
在无序环境中密集的极性活性流体
Dense polar active fluids in a disordered environment
论文作者
论文摘要
我们研究了淬火障碍对致密极性活性物质植入过渡的影响。我们考虑在猝灭随机力或随机稀释的作用下具有对齐相互作用的活性颗粒的不可压缩系统。该系统显示连续的疾病阶（羊群）过渡，相关的缩放行为由新的普遍性类描述，该类别由淬火的Navier-Stokes固定点控制。我们通过扰动重新归一化组分析确定关键指数。我们表明，与平衡处的情况相反，两种形式的猝灭障碍，随机力和随机质量（稀释）属于同一普遍性类别。
We examine the influence of quenched disorder on the flocking transition of dense polar active matter. We consider incompressible systems of active particles with aligning interactions under the effect of either quenched random forces or random dilution. The system displays a continuous disorder-order (flocking) transition, and the associated scaling behavior is described by a new universality class which is controlled by a quenched Navier-Stokes fixed point. We determine the critical exponents through a perturbative renormalization group analysis. We show that the two forms of quenched disorder, random force and random mass (dilution), belong to the same universality class, in contrast with the situation at equilibrium.
