论文标题
间歇性的有吸引力的相互作用导致非运动活性物质中的微相分离
Intermittent Attractive Interactions Lead to Microphase Separation in Non-motile Active Matter
论文作者
论文摘要
非运动活性物质表现出广泛的非平衡集体现象，但在文献中至关重要。我们提出了一个受细菌启发的微观模型（\ it Neiserseria脑膜化}}，其中扩散剂感觉到间歇性的吸引力。通过正式的粗粒程序，我们表明，这种真正的活动物质标量模型表现出定义{\ it Active Model B+}类的时间 - 反转对称性术语。特别是，我们通过数值求解动力学方程来确认微相分离的存在。我们表明，控制交互的开关速率提供了调节典型群集大小的调节机制，例如在通过IV型pili相互作用的细菌种群中。
Non-motile active matter exhibits a wide range of non-equilibrium collective phenomena yet examples are crucially lacking in the literature. We present a microscopic model inspired by the bacteria {\it Neisseria Meningitidis} in which diffusive agents feel intermittent attractive forces. Through a formal coarse-graining procedure, we show that this truly scalar model of active matter exhibits the time-reversal-symmetry breaking terms defining the {\it Active Model B+} class. In particular, we confirm the presence of microphase separation by solving the kinetic equations numerically. We show that the switching rate controlling the interactions provides a regulation mechanism tuning the typical cluster size, e.g. in populations of bacteria interacting via type IV pili.
