发表机构
California State University, Fullerton; The College of New Jersey; University of California, Riverside（富勒顿加州州立大学; 新泽西学院; 加州大学河滨分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过新颖实验技术，在液-液-气三相点模拟柔性边界，发现醋线虫集体运动可致周期性变形及动态突起，并构建数值模型解释其动力学。
AI 中文摘要
我们在实验上探索了醋线虫（T. Aceti）在柔性边界内的集体行为，揭示了此前未曾报道的状态。这些线虫此前已被证明在有利的受限空间条件下能够同步其身体振荡。在这种集体状态下，它们能够施加强大的推力，我们利用这一点来研究它们的集体运动如何使可弯曲的边界发生变形。通过一种新颖的实验技术，我们得以在液-液-气三相点处模拟非刚性边界。我们发现了一种具有周期性边界变形的状态，这种变形源于线虫的同步振荡。更有趣的是，我们发现了一种新的状态，其中线虫能够在边界上形成多个突起，这些突起会振荡、旋转、合并和分裂。我们提出了一个数值模型，能够重现该状态的某些观测参数，并为突起动力学提供分析性见解。我们的研究为探索活性物质与柔性界面之间的相互作用开辟了新途径，所采用的活性物质主体能够形成动态且非混沌的边界变形。
英文摘要
We experimentally explore the collective behavior of the nematode T. Aceti inside flexible boundaries showing the emergence of previously unreported states. These nematodes have been previously shown to be able to synchronize their body oscillations in a favorable condition of confined space. In this collective state, they are able to exert a strong pushing force which we exploit to study how their collective motion could deform a pliable boundary. Using a novel experimental technique, we were able to simulate a non-rigid border at a liquid-liquid-gas triple point. We discovered a state with periodic boundary deformations which are due to the synchronized oscillations of the nematodes. More interestingly, we found a novel state where the nematodes are able to form multiple protrusions in the border which oscillate, rotate, merge, and split. We propose a numerical model that is able to reproduce some of the observed parameters of this state as well as offer an analytical insight into protrusions dynamics. Our research opens a pathway for exploring the interaction between active matter and flexible interfaces with a new kinds of active matter agents forming dynamic non-chaotic border deformations.
