论文标题
粒状材料中的吸收状态过渡几乎可以堵塞
Absorbing-state transitions in granular materials close to jamming
论文作者
论文摘要
我们考虑了一个驱动颗粒物的模型，在该模型中，可以通过颗粒隔离和颗粒笼中达到吸收状态。该模型预测了一个非平衡相图，其中分别在低体积和高体积分数下出现流体动力和弹性可逆性的类似物，部分由扩散的，非吸收的区域分离。因此，我们发现了一个单相边界，该边界跨越了剪切悬浮液中混乱的发作，以在堵塞的包装中发作。该边界具有非平衡二阶相变的特性，使我们写了一个类似甘露的平均场描述，该描述捕获了模型预测。取决于接触细节，抑制了两个吸收状态之间的直接过渡，或者发生在扩散区域内。
We consider a model for driven particulate matter in which absorbing states can be reached both by particle isolation and by particle caging. The model predicts a non-equilibrium phase diagram in which analogues of hydrodynamic and elastic reversibility emerge at low and high volume fractions respectively, partially separated by a diffusive, non-absorbing region. We thus find a single phase boundary that spans the onset of chaos in sheared suspensions to the onset of yielding in jammed packings. This boundary has the properties of a non-equilibrium second order phase transition, leading us to write a Manna-like mean-field description that captures the model predictions. Dependent on contact details, jamming marks either a direct transition between the two absorbing states, or occurs within the diffusive region.
