论文标题
缺陷线在主动命名
Defect Line Coarsening and Refinement in Active Nematics
论文作者
论文摘要
主动物质自然是从平衡中出现的，这会导致各种动态稳态的出现，包括无处不在的混乱状态，称为活性湍流。但是，少得多的已知活动系统如何动态地摆脱这些配置，例如兴奋或阻尼到另一个动态稳态。在这封信中，我们证明了三维主动列湍流中拓扑缺陷线的粗化和完善动力学。具体而言，使用理论和数值建模，我们能够预测由于时间依赖性活性或粘弹性材料特性而导致的活性缺陷密度的演变，从而在三维主动列表中建立了缺陷线块状/改进的单个长度标准的现象学描述。该方法首先应用于单个活动缺陷循环的生长动力学，然后应用于完整的三维主动缺陷网络。更一般而言，这项工作提供了对3D主动物质动态状态之间一般粗糙现象的洞察力，在其他物理系统中可能类比。
Active matter is naturally out of equilibrium which results in the emergence of diverse dynamic steady states, including the omnipresent chaotic state known as the active turbulence. However, much less is known how active systems dynamically depart out of these configurations, such as get excited or damped to a different dynamic steady state. In this Letter, we demonstrate the coarsening and refinement dynamics of topological defect lines in three-dimensional active nematic turbulence. Specifically, using theory and numerical modelling, we are able to predict the evolution of the active defect density away from the steady state due to time-dependent activity or viscoelastic material properties, establishing a single length scale phenomenological description of defect line coarsening/refinement in a three-dimensional active nematic. The approach is first applied to growth dynamics of a single active defect loop, and then to a full three-dimensional active defect network. More generally, this work provides insight into the general coarsening phenomena between dynamical regimes in 3D active matter, with a possible analogy in other physical systems.
