论文标题
活跃物质的状态方程
An equation of state for active matter
论文作者
论文摘要
我们表征了二维活性布朗颗粒（ABP）悬浮液的稳态。我们将稳态概率分布计算为PECLET数字中的最低顺序。我们表明，可以使用此概率分布以类似的方式计算宏观数量。然后，我们得出宏观压力和位置方向相关函数的表达式。我们通过直接比较广泛的数值模拟来检查结果。一个关键的发现是即使在非常低的密度下，多体有效相互作用的重要性也是如此。
We characterise the steady states of a suspension of two-dimensional active brownian particles (ABPs). We calculate the steady-state probability distribution to lowest order in Peclet number. We show that macroscopic quantities can be calculated in analogous way to equilibrium systems using this probability distribution. We then derive expressions for the macroscopic pressure and position-orientation correlation functions. We check our results by direct comparison with extensive numerical simulations. A key finding is the importance of many-body effective interactions even at very low densities.
