动力易化解释了元基转换的民主粒子运动
Dynamic facilitation explains democratic particle motion of metabasin transitions
摘要：
在过冷液体中，变基之间的转变似乎是通过快速的“民主”集体粒子重排发生的。在这里，我们表明，这种明显的均匀粒子运动是动力学促进的直接后果。我们这样做是通过研究易化自旋模型和约束晶格气体的变基跃迁。我们发现，元基过渡发生在一个相对较短的时间范围内发生的一系列本地促进事件。当在足够小的空间窗口上观察时，这些事件显得突然而均匀。我们的研究结果表明，metabasin过渡本质上是“非民主”的起源和另一种表现的动态异质性的玻璃形成。
英文摘要：
Transitions between metabasins in supercooled liquids seem to occur through rapid "democratic" collective particle rearrangements. Here we show that this apparent homogeneous particle motion is a direct consequence of dynamic facilitation. We do so by studying metabasin transitions in facilitated spin models and constrained lattice gases. We find that metabasin transitions occur through a sequence of locally facilitated events taking place over a relatively short time frame. When observed on small enough spatial windows these events appear sudden and homogeneous. Our results indicate that metabasin transitions are essentially "non-democratic" in origin and yet another manifestation of dynamical heterogeneity in glass formers.
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