过冷液体中的动力学相变：解释动力学活动的测量
Dynamical phase transitions in supercooled liquids: interpreting measurements of dynamical activity
摘要：
研究了过冷液体模型中的动态相变。这些转变发生在偏向于低（或高）动态活动的轨迹集合中。我们比较了两种不同的措施，在最近的论文中介绍的活动，我们发现，他们是反相关的。为了解释这一结果，我们表明，这两个措施耦合到不同的长度和时间尺度上的运动。我们发现，非常缓慢的结构弛豫的非活性状态，但增加了短尺度上的分子运动。我们讨论了这些结果的系统的势能景观和在活跃/非活跃状态的液体结构。
英文摘要：
We study dynamical phase transitions in a model supercooled liquid. These transitions occur in ensembles of trajectories that are biased towards low (or high) dynamical activity. We compare two different measures of activity that were introduced in recent papers and we find that they are anti-correlated with each other. To interpret this result, we show that the two measures couple to motion on different length and time scales. We find that inactive states with very slow structural relaxation nevertheless have increased molecular motion on short scales. We discuss these results in terms of the potential energy landscape of the system and in terms of the liquid structure in active/inactive states.
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