论文标题
通过限制几何学和拓扑引起的主动植被中的缺陷动力学
Defect dynamics in active smectics induced by confining geometry and topology
论文作者
论文摘要
众所周知，系统中持续的动力学，尤其是以拓扑缺陷的歼灭和创造的特征的动力学，涉及复杂的时空过程，并且被认为难以控制。在这里，通过自我传播活跃的颗粒和各种具有不同拓扑的几何形状，探索了暴露于强限的活性近晶层中缺陷的复杂动力学，范围从圆形，花形的表皮形成，到低温小组型腔，通道，通道和环。我们在复杂的时空缺陷模式的演变过程中确定了许多动力学行为，这些模式是由狭窄的形状和拓扑结构引起的，尤其是在中间活动中的永久性创造 - 通知动力状态，具有大量拓扑缺陷的波动，拓扑缺陷的大波动以及从振荡到阻尼到阻尼时间校正后的防水数量的可控过渡，并通过机制委托进行了委托。我们的结果是通过使用活动相位晶体方法获得的。还讨论了可能的实验实现。
The persistent dynamics in systems out of equilibrium, particularly those characterized by annihilation and creation of topological defects, is known to involve complicated spatiotemporal processes and is deemed difficult to control. Here the complex dynamics of defects in active smectic layers exposed to strong confinements is explored, through self-propulsion of active particles and a variety of confining geometries with different topology, ranging from circular, flower-shaped epicycloid, to hypocycloid cavities, channels, and rings. We identify a wealth of dynamical behaviors during the evolution of complex spatiotemporal defect patterns as induced by the confining shape and topology, particularly a perpetual creation-annihilation dynamical state at intermediate activity with large fluctuations of topological defects and a controllable transition from oscillatory to damped time correlation of defect number density via mechanisms governed by boundary cusps. Our results are obtained by using an active phase field crystal approach. Possible experimental realizations are also discussed.
