是什么使复杂的液体复杂？
What makes a complex liquid complex?
摘要：
我们将复杂的液体视为连接每个粒子与其最近邻居的键的网络;该网络的动力学是一系列离散事件信号粒子重排。在这幅图中，我们研究了二维复杂液体，发现网络记忆的拉伸指数衰减和粒子保持最近邻居的时间分布的幂律;这种分布对温度的依赖性表明可能存在动力学临界点。我们确定并量化了潜在的时空现象。平衡液体代表了一种分层结构，一种由较不有序的区域部分分离的长寿命微晶的马赛克。这种结构的长期动力学是由动力学和结构不同区域之间的颗粒再分布所主导的。我们认为，这些是局部有序，但全球无序的复杂系统的一般特征。特别是，这些功能必须考虑到任何粗粒度的复杂流体和玻璃的动力学理论。
英文摘要：
We view a complex liquid as a network of bonds connecting each particle to its nearest neighbors; the dynamics of this network is a chain of discrete events signaling particles rearrangements. Within this picture, we studied a two-dimensional complex liquid and found a stretched-exponential decay of the network memory and a power-law for the distribution of the times for which a particle keeps its nearest neighbors; the dependence of this distribution on temperature suggests a possible dynamical critical point. We identified and quantified the underlying spatio-temporal phenomena. The equilibrium liquid represents a hierarchical structure, a mosaic of long-living crystallites partially separated by less-ordered regions. The long-time dynamics of this structure is dominated by particles redistribution between dynamically and structurally different regions. We argue that these are generic features of locally ordered but globally disordered complex systems. In particular, these features must be taken into account by any coarse-grained theory of dynamics of complex fluids and glasses.
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