自发丝状结构形成与活性相分离驱动的网络自组装
Spontaneous filament formation and network self-assembly via active phase separation
- Niels Bohr Institute, University of Copenhagen（尼尔斯·玻尔研究所，哥本哈根大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究提出活性模型H$^{-}$，通过活性相分离自发形成丝状网络，具有增强连接和停滞粗化特性，弯曲驱动自组装，宏观满足刘易斯定律。
AI中文摘要：
我们引入了活性模型H$^{-}$，这是一个在过阻尼流体动力学极限下的非平衡相分离标量相场模型，并展示了该模型能够产生具有增强连接性和停滞粗化的丝状网络，这种形态在现有的标量活性场理论中未曾观察到。孤立丝状结构对自发弯曲不稳定，由此产生的曲率驱动其向凸侧自推进，导致它们碰撞并组装成渗流网络。这些网络在局部处于非平衡状态，具有异常弯曲的边、无序的顶点角度和异质的拓扑电荷，但在宏观上恢复了刘易斯定律。在噪声作用下，它们表现出平衡的断裂与重组动态。
英文摘要：
We introduce Active Model H$^{-}$, a scalar phase-field model of non-equilibrium phase separation in the overdamped hydrodynamic limit, and show that it produces filamentous networks with enhanced connections and arrested coarsening, a morphology not observed in existing scalar active field theories. Isolated filaments are unstable to spontaneous bending, and the resulting curvature drives self-propulsion towards the convex side, causing them to collide and assemble into a percolating network. The networks are locally non-equilibrium, with anomalously curved edges, disordered vertex angles and heterogeneous topological charge, yet recover Lewis's law macroscopically. Under noise they show balanced break and reform dynamics.
