论文标题
如何研究持续的活动玻璃系统？
How to Study a Persistent Active Glassy System?
论文作者
论文摘要
我们探索了由活性力自发的软颗粒密集组件的玻璃状动力学。这些力具有固定幅度和推进方向，随着时间尺度的tau_p（持续时间尺度）变化。当动力学受较大的持久时间控制时，此类活动眼镜的数值模拟在计算上具有挑战性。我们详细描述了一种最近提出的方案，该方案允许人们直接研究大型持续时间限制的动态，并在周围的时间和持续时间远高于持久时间。我们讨论了所提出的方案背后的想法，我们称之为活动驱动的动态及其数值实现。我们确定我们的处方忠实地重现了适当限制的所有动态数量，tau_p属于无限。我们在密集且间歇性的活性玻璃的稳态动力学中详细介绍了详细探索的方法。
We explore glassy dynamics of dense assemblies of soft particles that are self-propelled by active forces. These forces have a fixed amplitude and a propulsion direction that varies on a timescale tau_p, the persistence timescale. Numerical simulations of such active glasses are computationally challenging when the dynamics is governed by large persistence times. We describe in detail a recently proposed scheme that allows one to study directly the dynamics in the large persistence time limit, on timecales around and well above the persistence time. We discuss the idea behind the proposed scheme, which we call activity-driven dynamics, as well as its numerical implementation. We establish that our prescription faithfully reproduces all dynamical quantities in the appropriate limit tau_p goes to infinity. We deploy the approach to explore in detail the statistics of Eshelby-like plastic events in the steady state dynamics of a dense and intermittent active glass.
