论文标题
对运动诱导的相分离动力学的惯性影响
Inertial Effects on Kinetics of Motility-Induced Phase Separation
论文作者
论文摘要
运动诱导的相位分离（MIP）非常重要，并且已经在过度阻尼的系统中进行了广泛的研究，但是，惯性会带来MIPS动力学的影响是缺乏研究。在这里，我们发现，不仅相变从连续到不连续的变化，而且簇的形成表现出类核的样过程，而没有任何粗糙的机制，与在过度抑制的情况下不同于旋转的分解。这种显着的动力学源于活动引起的颗粒积累与惯性诱导的聚类过程抑制之间的竞争。更有趣的是，即使颗粒质量与摩擦系数的比率降低到很小，例如0.0001，MIP的不连续性仍然存在。我们的发现强调了惯性在MIP的动力学中的重要性，并可能对了解活跃系统中MIP的性质的新观点开放。
Motility-induced phase separation (MIPS) is of great importance and has been extensively researched in overdamped systems, nevertheless, what impacts inertia will bring on kinetics of MIPS is lack of investigation. Here, we find that, not only the phase transition changes from continuous to discontinuous, but also the formation of clusters exhibits a nucleation-like process without any coarsening regime, different from spinodal decomposition in the overdamped case. This remarkable kinetics stems from a competition between activity-induced accumulation of particles and inertia-induced suppression of clustering process. More interestingly, the discontinuity of MIPS still exists even when the ratio of particle mass to the friction coefficient reduces to be very small such as 0.0001. Our findings emphasize the importance of inertia in kinetics of MIPS, and may open a new perspective on understanding the nature of MIPS in active systems.
