How to derive a predictive active field theory: a step-by-step tutorial

Autor:	Vrugt, Michael te, Bickmann, Jens, Wittkowski, Raphael
Rok vydání:	2022
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Materials Science Condensed Matter - Statistical Mechanics Physics - Chemical Physics
Druh dokumentu:	Working Paper
Popis:	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 interaction-expansion method (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. Comment: 21 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2212.00078 Zobrazit plný text záznamu View this record from Arxiv