论文标题
相分离的活动物质系统中的簇如何增长？在进行蒸汽固体过渡的系统中维克斯克活动的研究
How Do Clusters in Phase-Separating Active Matter Systems Grow? A study for Vicsek activity in systems undergoing vapor-solid transition
论文作者
论文摘要
通过分子动力学模拟，我们研究了活跃物质模型中蒸气“固体”相变的动力学，其中通过众所周知的Vicsek规则引入了自我推测。选择颗粒的总密度以使演化形态由断开的簇组成，这些簇被定义为颗粒高密度的区域。我们的重点是通过将结果与模型的被动限制进行比较，该结果对这些群集的结构和增长的影响一直在理解上述自我突出对这些群集的结构和生长的影响，该模型的被动限制也表现出了蒸气 - “固体”过渡。在被动的情况下，由于标准扩散机制而发生增长，但Vicsek活性通过实际上等同于弹道聚集机制的过程导致非常快速的生长。在后一种情况下，通过将有关群集的速度和结构方面的信息进行了准确估算和解释的新兴增长法。其中一些结果还参考了活性布朗颗粒的模型。
Via molecular dynamics simulations we have studied kinetics of vapor-"solid" phase transition in an active matter model in which self-propulsion is introduced via the well-known Vicsek rule. The overall density of the particles is chosen in such a way that the evolution morphology consists of disconnected clusters that are defined as regions of high density of particles. Our focus has been on understanding the influence of the above mentioned self-propulsion on structure and growth of these clusters by comparing the results with those for the passive limit of the model that also exhibits vapor-"solid" transition. While in the passive case the growth occurs due to standard diffusive mechanism, the Vicsek activity leads to a very rapid growth, via a process that is practically equivalent to the ballistic aggregation mechanism. The emerging growth law in the latter case has been accurately estimated and explained by invoking information on velocity and structural aspects of the clusters into a relevant theory. Some of these results are also discussed with reference to a model for the active Brownian particles.
