Phase Separation Kinetics in a Polar Active Field Model
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
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| _version_ | 1866915451565506560 |
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| author | Semeraro, Massimiliano Cugliandolo, Leticia F. Gonnella, Giuseppe Tiribocchi, Adriano |
| author_facet | Semeraro, Massimiliano Cugliandolo, Leticia F. Gonnella, Giuseppe Tiribocchi, Adriano |
| contents | A milestone of phase separation kinetics is the emergence of universal power laws $\sim t^{1/z}$ governing the domain growth evolution. We investigate a phase-separating polar active model comprising a scalar density field with an advective coupling to a polarization field. Our analysis reveals a novel $\sim t^{0.6}$ regime, which agrees well with the accelerated growth recently observed in simulations of polar active particles. We provide analytical arguments to explain how advection facilitates the creation of topological defects and compresses the domains leading to faster growth. We also show that the $\sim t^{0.6}$ regime is robust to several model generalizations. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_13888 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Phase Separation Kinetics in a Polar Active Field Model Semeraro, Massimiliano Cugliandolo, Leticia F. Gonnella, Giuseppe Tiribocchi, Adriano Soft Condensed Matter Statistical Mechanics A milestone of phase separation kinetics is the emergence of universal power laws $\sim t^{1/z}$ governing the domain growth evolution. We investigate a phase-separating polar active model comprising a scalar density field with an advective coupling to a polarization field. Our analysis reveals a novel $\sim t^{0.6}$ regime, which agrees well with the accelerated growth recently observed in simulations of polar active particles. We provide analytical arguments to explain how advection facilitates the creation of topological defects and compresses the domains leading to faster growth. We also show that the $\sim t^{0.6}$ regime is robust to several model generalizations. |
| title | Phase Separation Kinetics in a Polar Active Field Model |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2508.13888 |