主动相互作用时空调制运动的唯象模型
Phenomenological model of motility by spatiotemporal modulation of active interactions
摘要：
微观尺度的传输在生物系统和各种技术中至关重要，包括微流体。最近的实验实现了自组织运输现象的微管活性物质利用光来调节运动蛋白的活动在时间和空间。在这里，我们引入一个新的现象学模型来解释这样的实验。我们的模型，基于空间调制粒子相互作用，揭示了一个可能的机制，紧急运输现象，在光控活性物质，包括运动和收缩。特别是，该模型的分析处理阐明了作为物质运输的基本机制的活化粒子的质量质心的守恒，并证明了持续运动的记忆的必要性。此外，我们推广的模型来解释其他现象，如更复杂的激活几何形状引起的微管aster-aster相互作用。我们的研究结果表明，该模型提供了一个可能的基础光控活性物质的唯象理解，它将使活性物质设备的传输协议的设计和优化。
英文摘要：
Transport at microscopic length scales is essential in biological systems and various technologies, including microfluidics. Recent experiments achieved self-organized transport phenomena in microtubule active matter using light to modulate motor-protein activity in time and space. Here, we introduce a novel phenomenological model to explain such experiments. Our model, based on spatially modulated particle interactions, reveals a possible mechanism for emergent transport phenomena in light-controlled active matter, including motility and contraction. In particular, the model's analytic treatment elucidates the conservation of the center of mass of activated particles as a fundamental mechanism of material transport and demonstrates the necessity of memory for sustained motility. Furthermore, we generalize the model to explain other phenomena, like microtubule aster-aster interactions induced by more complicated activation geometries. Our results demonstrate that the model provides a possible foundation for the phenomenological understanding of light-controlled active matter, and it will enable the design and optimization of transport protocols for active matter devices.
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