Spontaneous Ratchet Currents and Transition Dynamics in Active Wetting
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911310381318144 |
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| author | Grodzinski, Noah Jack, Robert L. Cates, Michael E. |
| author_facet | Grodzinski, Noah Jack, Robert L. Cates, Michael E. |
| contents | Self-propelled particles accumulate on repulsive barriers in so-called active wetting, but the relationship between this process and equilibrium wetting remains unclear. Using an exact (noiseless) hydrodynamic framework for an active lattice gas, we show, using a slit geometry with periodic boundary conditions, that active matter exhibits both fully- and partially-wet states, with a critical wetting transition between them. Furthermore, we demonstrate the existence of a spontaneous-symmetry-breaking ratchet current in the partially wet state, leading to departure of the bulk densities from their binodal values and the emergence of a novel dynamical pathway for the full-to-partial wetting transition. We elucidate this modified dynamical pathway using a minimal model. The results, while establishing a direct connection between active and equilibrium wetting, also identify the nonequilibrium consequences of activity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_08761 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spontaneous Ratchet Currents and Transition Dynamics in Active Wetting Grodzinski, Noah Jack, Robert L. Cates, Michael E. Statistical Mechanics Soft Condensed Matter Self-propelled particles accumulate on repulsive barriers in so-called active wetting, but the relationship between this process and equilibrium wetting remains unclear. Using an exact (noiseless) hydrodynamic framework for an active lattice gas, we show, using a slit geometry with periodic boundary conditions, that active matter exhibits both fully- and partially-wet states, with a critical wetting transition between them. Furthermore, we demonstrate the existence of a spontaneous-symmetry-breaking ratchet current in the partially wet state, leading to departure of the bulk densities from their binodal values and the emergence of a novel dynamical pathway for the full-to-partial wetting transition. We elucidate this modified dynamical pathway using a minimal model. The results, while establishing a direct connection between active and equilibrium wetting, also identify the nonequilibrium consequences of activity. |
| title | Spontaneous Ratchet Currents and Transition Dynamics in Active Wetting |
| topic | Statistical Mechanics Soft Condensed Matter |
| url | https://arxiv.org/abs/2512.08761 |