Density-Independent transient caging in the high-density phase of motility-induced phase separation
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| Format: | Preprint |
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2025
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| _version_ | 1866914348805390336 |
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| author | Umemura, Toranosuke Sakai, Issei Akimoto, Takuma |
| author_facet | Umemura, Toranosuke Sakai, Issei Akimoto, Takuma |
| contents | 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 transient caging, 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 an intermediate regime with pronounced dynamical arrest. Our findings identify a distinct high-density regime characterized by transient caging and dynamical slowing down in a monodisperse active system, shedding new light on the connection between MIPS and nonequilibrium arrest. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_13140 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Density-Independent transient caging in the high-density phase of motility-induced phase separation Umemura, Toranosuke Sakai, Issei Akimoto, Takuma Soft Condensed Matter Statistical Mechanics 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 transient caging, 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 an intermediate regime with pronounced dynamical arrest. Our findings identify a distinct high-density regime characterized by transient caging and dynamical slowing down in a monodisperse active system, shedding new light on the connection between MIPS and nonequilibrium arrest. |
| title | Density-Independent transient caging in the high-density phase of motility-induced phase separation |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2506.13140 |