Integer Topological Defects Reveal Anti-Symmetric Forces in Active Nematics

Autor:	Zhao, Zihui, Yao, Yisong, Li, He, Zhao, Yongfeng, Wang, Yujia, Zhang, Hepeng, Chat'e, Hugues, Sano, Masaki
Rok vydání:	2024
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Statistical Mechanics Physics - Biological Physics
Druh dokumentu:	Working Paper
Popis:	Cell layers are often categorized as contractile or extensile active nematics but recent experiments on neural progenitor cells with induced $+1$ topological defects challenge this classification. In a bottom-up approach, we first study a relevant particle-level model and then analyze a continuous theory derived from it. We show that both model and theory account qualitatively for the main experimental result, i.e. accumulation of cells at the core of any type of +1 defect. We argue that cell accumulation is essentially due to two generally ignored 'effective active forces'. We finally discuss the relevance and consequences of our findings in the context of other cellular active nematics experiments and previously proposed theories. Comment: 7 pages, 5 figures, plus Supplemental Information, in revision: typo corrected, references added, Figure 5a corrected, Supplement III modified
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2408.15431 Zobrazit plný text záznamu View this record from Arxiv