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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2505.02342 |
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| _version_ | 1866916719681863680 |
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| author | Zhang, Qun Tian, Yuxin Zhang, Xue Yu, Xiaoting Zhu, Hongwei Zheng, Ning Ning, Luhui Ni, Ran Yang, Mingcheng Liu, Peng |
| author_facet | Zhang, Qun Tian, Yuxin Zhang, Xue Yu, Xiaoting Zhu, Hongwei Zheng, Ning Ning, Luhui Ni, Ran Yang, Mingcheng Liu, Peng |
| contents | Using granular experiments and computer simulations, we investigate the long-time diffusion of active tracers in a broad class of complex media composed of frozen obstacles of diverse structures. By introducing a dimensionless persistence length $Q = v_d τ_r / d_t$, we propose a modified scaling relation that independently collapses experimental and simulation results across active and passive particles, diverse media, and distinct propulsion mechanisms. Our results reveal a universal active diffusion-structure relation that holds across both equilibrium and nonequilibrium regimes, providing a simple predictive framework for active diffusion in complex environments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_02342 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A universal scaling law for active diffusion in complex media Zhang, Qun Tian, Yuxin Zhang, Xue Yu, Xiaoting Zhu, Hongwei Zheng, Ning Ning, Luhui Ni, Ran Yang, Mingcheng Liu, Peng Soft Condensed Matter Using granular experiments and computer simulations, we investigate the long-time diffusion of active tracers in a broad class of complex media composed of frozen obstacles of diverse structures. By introducing a dimensionless persistence length $Q = v_d τ_r / d_t$, we propose a modified scaling relation that independently collapses experimental and simulation results across active and passive particles, diverse media, and distinct propulsion mechanisms. Our results reveal a universal active diffusion-structure relation that holds across both equilibrium and nonequilibrium regimes, providing a simple predictive framework for active diffusion in complex environments. |
| title | A universal scaling law for active diffusion in complex media |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2505.02342 |