Intrinsic pressure as a convenient mechanical framework for dry active matter
Abstract
The identification of local pressure in active matter systems remains a subject of considerable debate. Through theoretical calculations and extensive simulations of various active systems, we demonstrate that intrinsic pressure (defined in the same way as in passive systems) is an ideal candidate for local pressure of dry active matter, while the self-propelling forces on the active particles are considered as effective external forces originating from the environment. Such a framework is universal and especially convenient for analyzing mechanics of dry active systems, and it recovers the conventional scenario of mechanical equilibrium well-known in passive systems. Thus, our work is of fundamental importance to further explore mechanics and thermodynamics of complex active systems.
Cite
@article{arxiv.2507.14644,
title = {Intrinsic pressure as a convenient mechanical framework for dry active matter},
author = {Zihao Sun and Longfei Li and Chuyun Wang and Jing Wang and Huaicheng Chen and Gao Wang and Liyu Liu and Fangfu Ye and Mingcheng Yang},
journal= {arXiv preprint arXiv:2507.14644},
year = {2025}
}
Comments
8 pages,4 figures