CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Initial-state dependence of phase behaviors in a dense active system |
Lu Chen(陈璐)1,2,†, Bokai Zhang(张博凯)3, and Z. C. Tu(涂展春)1 |
1. Department of Physics, Beijing Normal University, Beijing 100875, China; 2. Complex Systems Division, Beijing Computational Science Research Center, Beijing 100193, China; 3. School of Physical Science and Technology, Southwest University, Chongqing 400715, China |
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Abstract There are rich emergent phase behaviors in non-equilibrium active systems. Flocking and clustering are two representative dynamic phases. The relationship between both the phases is still unclear. Herein, we numerically investigate the evolution of flocking and clustering in a system consisting of self-propelled particles with active reorientation. We consider the interplay between flocking and clustering phases with different initial configurations, and observe a domain in steady state order parameter phase diagrams sensitive to the choice of initial configurations. Specifically, by tuning the initial degree of polar ordering, either a more ordered flocking or a disordered clustering state can be observed in the steady state. These results enlighten us to manipulate emergent behaviors and collective motions of an active system, and are qualitatively different from the emergence of a new bi-stable regime observed in aligned active particles due to an explicit attraction [New J. Phys. 14 073033 (2012)].
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Received: 29 December 2022
Revised: 12 February 2023
Accepted manuscript online: 04 April 2023
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PACS:
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64.70.dg
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(Crystallization of specific substances)
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81.30.-t
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(Phase diagrams and microstructures developed by solidification and solid-solid phase transformations)
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05.60.Cd
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(Classical transport)
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07.05.Tp
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(Computer modeling and simulation)
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Fund: The research was supported by the National Natural Science Foundation of China (Grant Nos.U2230402, 11975050, 11735005, and 11904320). |
Corresponding Authors:
Lu Chen
E-mail: lu_chen@mail.bnu.edu.cn
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Cite this article:
Lu Chen(陈璐), Bokai Zhang(张博凯), and Z. C. Tu(涂展春) Initial-state dependence of phase behaviors in a dense active system 2023 Chin. Phys. B 32 086401
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