Quadrupolar gyration of a Brownian particle in a confining ring
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866911102437163008 |
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| author | Abdoli, Iman Löwen, Hartmut |
| author_facet | Abdoli, Iman Löwen, Hartmut |
| contents | We develop a minimal theoretical model that reveals a structured steady-state flux field with four alternating local circulation, a phenomenon we refer to as quadrupolar gyration. A passive Brownian particle is confined to move in a ring-shaped trap and driven far from equilibrium solely by anisotropic thermal fluctuations from two orthogonal heat baths held at different temperatures. By breaking detailed balance, this fundamental temperature anisotropy induces a robust nonequilibrium steady state characterized by probability currents of the particle's motion. Remarkably, these currents self-organize into a distinctive quadrupolar vortex pattern, providing a clear signature of emergent symmetry breaking, irreversible entropy production, and coherent motion in minimal passive systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_08792 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quadrupolar gyration of a Brownian particle in a confining ring Abdoli, Iman Löwen, Hartmut Statistical Mechanics Soft Condensed Matter Applied Physics We develop a minimal theoretical model that reveals a structured steady-state flux field with four alternating local circulation, a phenomenon we refer to as quadrupolar gyration. A passive Brownian particle is confined to move in a ring-shaped trap and driven far from equilibrium solely by anisotropic thermal fluctuations from two orthogonal heat baths held at different temperatures. By breaking detailed balance, this fundamental temperature anisotropy induces a robust nonequilibrium steady state characterized by probability currents of the particle's motion. Remarkably, these currents self-organize into a distinctive quadrupolar vortex pattern, providing a clear signature of emergent symmetry breaking, irreversible entropy production, and coherent motion in minimal passive systems. |
| title | Quadrupolar gyration of a Brownian particle in a confining ring |
| topic | Statistical Mechanics Soft Condensed Matter Applied Physics |
| url | https://arxiv.org/abs/2508.08792 |