Multiple Types of Aging in Active Glasses.
Multiple Types of Aging in Active Glasses.
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主动眼镜的多种老化类型。
DOI：
10.1103/physrevlett.125.218001
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发表时间：
2020
影响因子：
8.6
通讯作者：
Peter Sollich
中科院分区：
文献类型：
--
作者：
R. Mandal;Peter Sollich
最近的实验和模拟已经揭示了玻璃特征，例如，细胞质、活组织和自推进胶体的致密组件。这就引出了一个基本问题：这些非平衡（活性）非晶材料与通过降低温度或增加密度产生的传统被动玻璃有何不同？为了解决这个问题，我们调查淬火后的老化几乎逮捕的模型活性玻璃形成，一个Kob-Andersen玻璃在两个维度的状态。每一个组成粒子都被一个恒定的推进力所驱动，其方向随着时间的推移而扩散。使用广泛的分子动力学模拟，我们揭示了丰富的老化行为，这个密集的活性物质系统：短的持续时间的积极迫使有效的热老化，在相反的限制，我们发现一个两步的老化过程，在短时间内主动非热老化和活动驱动的老化在晚的时候。我们开发了一种专用的模拟方法，可以访问这种长期的缩放制度，高度持久的积极力量。
Recent experiments and simulations have revealed glassy features in, e.g., cytoplasm, living tissues and dense assemblies of self-propelled colloids. This leads to a fundamental question: how do these nonequilibrium (active) amorphous materials differ from conventional passive glasses, created by lowering temperature or increasing density? To address this we investigate the aging after a quench to an almost arrested state of a model active glass former, a Kob-Andersen glass in two dimensions. Each constituent particle is driven by a constant propulsion force whose direction diffuses over time. Using extensive molecular dynamics simulations we reveal rich aging behavior of this dense active matter system: short persistence times of the active forcing give effective thermal aging; in the opposite limit we find a two-step aging process with active athermal aging at short times and activity-driven aging at late times. We develop a dedicated simulation method that gives access to this longtime scaling regime for highly persistent active forces.
影响因子：
12.5
作者：
Bi, Dapeng;Yang, Xingbo;Manning, M. Lisa
通讯作者：
Manning, M. Lisa