Vrugt Michael Te, Bickmann Jens, Wittkowski Raphael
Institut für Theoretische Physik, Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany.
J Phys Condens Matter. 2023 May 10;35(31). doi: 10.1088/1361-648X/acc440.
The study of active soft matter has developed into one of the most rapidly growing areas of physics. Field theories, which can be developed either via phenomenological considerations or by coarse-graining of a microscopic model, are a very useful tool for understanding active systems. Here, we provide a detailed review of a particular coarse-graining procedure, the(IEM). The IEM allows for the systematic microscopic derivation of predictive field theories for systems of interacting active particles. We explain in detail how it can be used for a microscopic derivation of active model B+, which is a widely used scalar active matter model. Extensions and possible future applications are also discussed.
活性软物质的研究已发展成为物理学中发展最为迅速的领域之一。场论可通过唯象考虑或微观模型的粗粒化来建立，是理解活性系统的非常有用的工具。在此，我们对一种特定的粗粒化过程——相互作用有效介质（IEM）进行详细综述。IEM 允许对相互作用的活性粒子系统的预测场论进行系统的微观推导。我们详细解释了它如何用于活性模型 B + 的微观推导，活性模型 B + 是一种广泛使用的标量活性物质模型。还讨论了其扩展和可能的未来应用。
