2025/06/16 by Umemura, Toranosuke, Sakai, Issei, Akimoto, Takuma
#FOS: Physical sciences #Soft Condensed Matter (cond-mat.soft) #Statistical Mechanics (cond-mat.stat-mech)
paper · doi:10.48550/arxiv.2506.13140
We investigate the nonequilibrium dynamics of active matter using a two-dimensional active Brownian particles model. In these systems, self-propelled particles undergo motility-induced phase separation (MIPS), spontaneously segregating into dense and dilute phases. We find that in the high-density phase, local particle mobility exhibits glassy behavior, with diffusivity remaining unchanged despite variations in the global system density. As global density increases further, the system undergoes a transition to a solid-like state through this glassy phase. These findings provide insights into nonequilibrium phase transitions in active matter, revealing a robust glassy phase en route to solidification, and may guide future studies in both synthetic and biological active systems.