Cluster dynamics in macroscopic photoactive particles
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916926411767808 |
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| author | Lévay, Sára Katona, Axel Löwen, Hartmut Hidalgo, Raúl Cruz Zuriguel, Iker |
| author_facet | Lévay, Sára Katona, Axel Löwen, Hartmut Hidalgo, Raúl Cruz Zuriguel, Iker |
| contents | We present an experimental study on the collective behavior of macroscopic self-propelled particles that are externally excited by light. This property allows testing the system response to the excitation intensity in a very versatile manner. We discover that for low excitation intensities, clustering at the boundaries is always present, even when this is prevented by implementing flower-shaped confining walls. For high excitation intensities, however, clusters are dissolved more or less easily depending on their size. Then, a thorough analysis of the cluster dynamics allows us to depict a phase diagram depending on the number of agents in the arena and the excitation intensity. To explain this, we introduce a simple kinetic model where cluster evolution is governed by a balance between adsorption and desorption processes. Interestingly, this simple model is able to reproduce the phase space observed experimentally. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_14419 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cluster dynamics in macroscopic photoactive particles Lévay, Sára Katona, Axel Löwen, Hartmut Hidalgo, Raúl Cruz Zuriguel, Iker Soft Condensed Matter Other Condensed Matter We present an experimental study on the collective behavior of macroscopic self-propelled particles that are externally excited by light. This property allows testing the system response to the excitation intensity in a very versatile manner. We discover that for low excitation intensities, clustering at the boundaries is always present, even when this is prevented by implementing flower-shaped confining walls. For high excitation intensities, however, clusters are dissolved more or less easily depending on their size. Then, a thorough analysis of the cluster dynamics allows us to depict a phase diagram depending on the number of agents in the arena and the excitation intensity. To explain this, we introduce a simple kinetic model where cluster evolution is governed by a balance between adsorption and desorption processes. Interestingly, this simple model is able to reproduce the phase space observed experimentally. |
| title | Cluster dynamics in macroscopic photoactive particles |
| topic | Soft Condensed Matter Other Condensed Matter |
| url | https://arxiv.org/abs/2412.14419 |