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A Quorum Sensing Active Matter in a Confined Geometry |
| Yuxin Zhou1, Yunyun Li1*, and Fabio Marchesoni1,2* |
1MOE Key Laboratory of Advanced Micro-Structured Materials and Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
2Dipartimento di Fisica, Università di Camerino, I-62032 Camerino, Italy
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| Cite this article: |
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Yuxin Zhou, Yunyun Li, and Fabio Marchesoni 2023 Chin. Phys. Lett. 40 100505 |
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Abstract Inspired by the problem of biofilm growth, we numerically investigate clustering in a two-dimensional suspension of active (Janus) particles of finite size confined in a circular cavity. Their dynamics is regulated by a non-reciprocal mechanism that causes them to switch from active to passive above a certain threshold of the perceived near-neighbor density (quorum sensing). A variety of cluster phases, i.e., glassy, solid (hexatic) and liquid, are observed, depending on the particle dynamics at the boundary, the quorum sensing range, and the level of noise.
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Received: 19 July 2023
Published: 10 October 2023
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| PACS: |
36.40.Sx
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(Diffusion and dynamics of clusters)
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64.75.Xc
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(Phase separation and segregation in colloidal systems)
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82.30.Nr
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(Association, addition, insertion, cluster formation)
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05.40.Jc
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(Brownian motion)
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05.20.Jj
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(Statistical mechanics of classical fluids)
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