AI 中文总结
研究人员从高持续区硬核活性布朗粒子的类Enskog动理学理论出发,从头推导得到AMB+,并通过对关联函数的有效参数化使有效自由能有两个极小值,给出模型系数的佩克莱特数 leading 阶近似表达式。
AI 中文摘要
为理解活性相分离现象,Active Model B+(AMB+)这类自上而下的通用理论会添加破坏时间反演对称性的通量。我们从高持续区硬核活性布朗粒子的类Enskog动理学理论出发,从头推导得到AMB+。为使有效自由能存在两个极小值,我们提出对关联函数的有效参数化方案,并给出模型中所有系数的显式表达式,该表达式是微观参数的函数,且为佩克莱特数的 leading 阶近似。
英文摘要
To understand the phenomena displayed in active phase separation, general top-down theories like Active Model B+ (AMB+) add fluxes that break time reversal symmetry. Starting from an Enskog-like kinetic theory of hard-core active Brownian particles in the high persistence regime, we derive AMB+ from first principles. For the effective free energy to have two minima, we propose an effective parametrization of the pair correlation function. Explicit expressions for all coefficients in the model are given as a function of the microscopic parameters to leading order in the Péclet number.