论文标题
密集的活性棕色粒子系统中的传输系数：模式耦合理论和仿真结果
Transport Coefficients in Dense Active Brownian Particle Systems: Mode-Coupling Theory and Simulation Results
论文作者
论文摘要
我们讨论了开发活性布朗颗粒（ABP）二维系统玻璃转变（MCT）的模式耦合理论的最新进展。我们特别讨论了在形成玻璃的被动宿主悬架中单个ABP示踪剂的情况。最近在胶体Janus颗粒实验中研究了一个案例。我们采用事件驱动的布朗动力学（ED-BD）计算机模拟来测试ABP-MCT，并在两者之间为MSD找到良好的一致性。 ED-BD仿真结果也与实验数据相比，尽管需要独特的非单调映射，但仍需要自我刺激速度。 ABP-MCT预测了长期扩散系数与宿主系统粘度之间的Stokes-Einstein关系的特定自我渗透依赖性，该粘度与仿真结果非常匹配。 ABP-MCT在集成直通瞬变（ITT）框架中的应用，以计算相互作用ABP的密度纯正的有效游泳速度与玻璃过渡的密度下的ED-BD仿真数据有定性，并且仅在用于全密度范围的密度范围内，仅在用于通路系统的包装型绘制后才进行全密度范围。
We discuss recent advances in developing a mode-coupling theory of the glass transition (MCT) of two-dimensional systems of active Brownian particles (ABP). We specifically discuss the case of a single ABP tracer in a glass-forming passive host suspension; a case that has recently been studied in experiments on colloidal Janus particles. We employ event-driven Brownian dynamics (ED-BD) computer simulations to test the ABP-MCT, and find good agreement between the two for the MSD. The ED-BD simulation results also compare well to experimental data, although a peculiar non-monotonic mapping of self-propulsion velocities is required. The ABP-MCT predicts a specific self-propulsion dependence of the Stokes-Einstein relation between the long-time diffusion coefficient and the host-system viscosity that matches well the results from simulation. An application of ABP-MCT within the integration-through transients (ITT) framework to calculate the density-renormalized effective swim velocity of the interacting ABP agrees qualitatively with the ED-BD simulation data at densities close to the glass transition, and quantitatively for the full density range only after the mapping of packing fractions employed for the passive system.
