Conservation laws and slow dynamics determine the universality class of interfaces in active matter
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908940401377280 |
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| author | Maire, Raphaël Plati, Andrea Smallenburg, Frank Foffi, Giuseppe |
| author_facet | Maire, Raphaël Plati, Andrea Smallenburg, Frank Foffi, Giuseppe |
| contents | While equilibrium interfaces display universal large-scale statistics, interfaces in phase-separated active and driven systems are predicted to belong to distinct non-equilibrium universality classes. Yet, such behavior has proven difficult to observe, with most systems exhibiting equilibrium-like fluctuations despite their strongly non-equilibrium microscopic dynamics. We introduce a hard-disk model driven by active collisions, conceived as an effective 2D description of a vibrofluidized granular system that, contrary to self-propelled models, displays clear non-equilibrium interfacial scaling. We observe for the first time, the $|\boldsymbol q|$KPZ and wet-$|\boldsymbol q|$KPZ universality classes while revealing a new, previously overlooked universality class arising in systems with slow solid-like or glassy dynamics. Conservation laws and slow dynamics select these distinct classes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_18947 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Conservation laws and slow dynamics determine the universality class of interfaces in active matter Maire, Raphaël Plati, Andrea Smallenburg, Frank Foffi, Giuseppe Statistical Mechanics Soft Condensed Matter While equilibrium interfaces display universal large-scale statistics, interfaces in phase-separated active and driven systems are predicted to belong to distinct non-equilibrium universality classes. Yet, such behavior has proven difficult to observe, with most systems exhibiting equilibrium-like fluctuations despite their strongly non-equilibrium microscopic dynamics. We introduce a hard-disk model driven by active collisions, conceived as an effective 2D description of a vibrofluidized granular system that, contrary to self-propelled models, displays clear non-equilibrium interfacial scaling. We observe for the first time, the $|\boldsymbol q|$KPZ and wet-$|\boldsymbol q|$KPZ universality classes while revealing a new, previously overlooked universality class arising in systems with slow solid-like or glassy dynamics. Conservation laws and slow dynamics select these distinct classes. |
| title | Conservation laws and slow dynamics determine the universality class of interfaces in active matter |
| topic | Statistical Mechanics Soft Condensed Matter |
| url | https://arxiv.org/abs/2511.18947 |