Self-propelled active particles are inherently out of equilibrium as they collect energy from their surroundings and transform it into directed motion. A recent theoretical study suggests that binary mixtures of active particles with distinct effective diffusion coefficients exhibit dynamical demixing when their diffusion coefficients differ by more than one order of magnitude. Here, we show that this difference may be reduced drastically in the presence of external fields even when the response to the field is the same for both species. We investigate this demixing as a function of the ratio of the diffusion coefficients and discuss the implications of the results for active systems.

中文翻译：

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在外部场的作用下分解活性颗粒

自走式主动粒子固有地不平衡，因为它们从周围环境中收集能量并将其转换为定向运动。一项最新的理论研究表明，当有效粒子的扩散系数相差一个以上数量级时，具有不同有效扩散系数的二元混合物会表现出动态混合。在这里，我们表明，即使在两个物种对场的响应相同的情况下，在存在外部场的情况下，这种差异也可能会大大减少。我们研究了这种扩散与扩散系数之比的函数关系，并讨论了结果对有源系统的影响。