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化学活性液滴的记忆驱动自推进与聚集

Memory-Driven Self-Propulsion and Flocking of Chemically Active Droplets

Samuel Kovach, Trevor GrandPre

arXiv 2607.14451首次发表:更新:

AI 中文总结

研究生物分子凝聚物相关问题,通过发展具有非马尔可夫反应的活性相分离理论,揭示延迟反应反馈对液滴状态的影响,以及在多液滴系统中的作用,确立反应记忆为控制参数,关联多种细胞行为。

AI 中文摘要

生物分子凝聚物通过生化反应不断重塑,可展现非马尔可夫、历史依赖动力学。我们发展了具有非马尔可夫反应的活性相分离理论,表明延迟反应反馈会使静止液滴不稳定。当记忆时间与反应周转时间可比时,凝聚物变形并自发获得极性、自推进状态。在多液滴系统中,持久记忆尾流介导排列,产生极性聚集体,在更高浓度下产生移动迷宫。这些结果将反应记忆确立为活性相分离的控制参数,连接凝聚物重塑、自主运动性和集体组织,并提示细胞内类聚集行为的可能途径。

英文摘要

Biomolecular condensates are continually remodeled by biochemical reactions that can exhibit non-Markovian, history-dependent dynamics. We develop a theory of active phase separation with non-Markovian reactions and show that delayed reaction feedback destabilizes stationary droplets: when the memory time becomes comparable to the reaction turnover time, condensates deform and spontaneously acquire a polar, self-propelled state. In multidroplet systems, persistent memory wakes mediate alignment, producing polar flocks and, at higher concentrations, traveling labyrinths. These results establish reaction memory as a control parameter of active phase separation, linking condensate remodeling, autonomous motility, and collective organization, and suggest a possible route to flocking-like behavior within cells.

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