论文标题
超冷的液体是fickian却非高斯吗？
Are supercooled liquids Fickian yet non Gaussian?
论文作者
论文摘要
评论Rusciano等人的“玻璃形成液体中的非高斯非高斯扩散”。莱特牧师。 128，168001（2022）。在最近的一封信中，Rusciano等人。检查了二维玻璃形成剂中各个颗粒位移的统计数据，并得出结论，在于点位移为fickian的时间机制中，相应的概率分布是非高斯的。在这里，我们澄清说，这项工作中报告的多个长度尺度和时间尺度之前已经表征了，或者定义不太明确。这使我们提出了玻璃形式表现出高斯非高斯行为的结论，并提出了这一结论，并且这种类比有效地解决了有关这些系统中动态异质性的性质的核心问题。
Comment on `Fickian Non-Gaussian Diffusion in Glass-Forming Liquids', by Rusciano et al., Phys. Rev. Lett. 128, 168001 (2022). In a recent Letter, Rusciano et al. examined the statistics of individual particles displacements in two-dimensional glass-formers and concluded that the corresponding probability distribution is non-Gaussian in a time regime where the mean-squared displacement is Fickian. Here, we clarify that the multiple length scales and time scales reported in this work have either been characterized before, or are not well-defined. This leads us to dispute the conclusions that glass-formers display Fickian non-Gaussian behaviour and that this analogy fruitfully addresses the central questions regarding the nature of dynamic heterogeneity in these systems.
