论文标题
由随机出生和死亡事件确定的活性和被动的布朗颗粒中的液态 - 脱粒相
Liquid-Hexatic-Solid phases in active and passive Brownian particles determined by stochastic birth and death events
论文作者
论文摘要
我们研究了随机出生和死亡过程对受体积排除的活性和被动布朗颗粒系统结构阶段的影响。系统中的粒子总数是波动的数量，由出生和死亡参数和颗粒的活性决定。随着出生和死亡参数的变化，我们发现了液体，近似和实心相。对于被动粒子，发现这些相在空间上是均匀的。对于主动颗粒运动诱导的相分离（共存的六角形和液相）发生在大活动和足够小的出生率中。当出生率提高时，我们还观察到向示型阶段的重点过渡。这是由于越来越多的颗粒填充系统的平衡，以及由于出生和死亡动态而导致的大量缺陷。
We study the effects of stochastic birth and death processes on the structural phases of systems of active and passive Brownian particles subject to volume exclusion. The total number of particles in the system is a fluctuating quantity, determined by the birth and death parameters, and on the activity of the particles. As the birth and death parameters are varied we find liquid, hexatic and solid phases. For passive particles these phases are found to be spatially homogeneous. For active particles motility-induced phase separation (co-existing hexatic and liquid phases) occurs for large activity and sufficiently small birth rates. We also observe a re-entrant transition to the hexatic phase when the birth rate is increased. This results from a balance of an increasing number of particles filling the system, and a larger number of defects resulting from the birth and death dynamics.
