부산대학교 도서관

Using computer simulation and analytical theory, we study an active analog of the well-known Tonks gas, where active Brownian particles are confined to a one-dimensional (1D) channel. By introducing the notion of a kinetic temperature, we derive an accurate analytical expression for the pressure and clarify the paradoxical behavior where active Brownian particles confined to 1D exhibit anomalous clustering but no motility-induced phase transition. More generally, this work provides a deeper understanding of pressure in active systems as we uncover a unique link between the kinetic temperature and swim pressure valid for active Brownian particles in higher dimensions.
Comment: 4 page main text + 3 page SI. Simulation videos available at: https://www.dropbox.com/sh/3jz9bmgv1gfbfd1/AACj8DoMqXtg7U0OKpjkQrMaa?dl=0