局域软模与过冷液体通过位形空间的不可逆过程
Localised soft modes and the supercooled liquid's irreversible passage through its configuration space
摘要：
利用计算机模拟，我们表明，在一个过冷液体中的配置的本地化低频正常模式强烈相关的不可逆结构重组的粒子内的配置。建立这种相关性构成了确定后续运动的异质性的配置方面的识别。我们证明了软本地模式的总和的空间分布可以持续，尽管粒子重组，产生显着的变化，在个别模式。随着空间定位，软模式在粒子弛豫中的持续影响导致移动粒子在称为β弛豫的时间尺度上的位移的各向异性。
英文摘要：
Using computer simulations, we show that the localized low frequency normal modes of a configuration in a supercooled liquid are strongly correlated with the irreversible structural reorganization of the particles within that configuration. Establishing this correlation constitutes the identification of the aspect of a configuration that determines the heterogeneity of the subsequent motion. We demonstrate that the spatial distribution of the summation over the soft local modes can persist in spite of particle reorganization that produces significant changes in individual modes. Along with spatial localization, the persistent influence of soft modes in particle relaxation results in anisotropy in the displacements of mobile particles over the timescale referred to as beta relaxation.
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