arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.02108cond-mat.soft
收藏

圆形禁闭中可变形的活动粒子和边缘流

Deformable active nematic particles and emerging edge currents in circular confinements

Veit Krause, Axel Voigt

摘要:

我们考虑一个相互作用的活性粒子的微观场论方法。只有空间相互作用,这种系统中的自推进强度可以导致不同的集体行为,例如,同步的自我旋转和集体翻译。不同的行为是由于内部颗粒结构、颗粒形状变形和颗粒-颗粒相互作用之间的微妙相互作用。对于中间活性强度,出现不对称形状,并导致手性和自旋转晶体。对于较大的主动强度,形状是对称的,并且出现平移集体运动。在圆形的约束,根据包装分数,自旋制度要么稳定的位置和取向顺序,或可能导致边缘电流和全球旋转,破坏同步自旋晶体结构。

英文摘要:

We consider a microscopic field theoretical approach for interacting active nematic particles. With only steric interactions the self-propulsion strength in such systems can lead to different collective behaviour, e.g., synchronized self-spinning and collective translation. The different behaviour results from the delicate interplay between internal nematic structure, particle shape deformation and particle-particle interaction. For intermediate active strength an asymmetric shape emerges and leads to chirality and self-spinning crystals. For larger active strength the shape is symmetric and translational collective motion emerges. Within circular confinements, depending on the packing fraction, the self-spinning regime either stabilizes positional and orientational order or can lead to edge currents and global rotation which destroys the synchronized self-spinning crystalline structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑