Volume 142, Number 4, May 2023
|Number of page(s)||7|
|Section||Biological and soft matter physics|
|Published online||30 May 2023|
Swirling transition with social interactions: Analyzed by a sixth-order Landau-type model(a)
Institute of Theoretical Physics, Technische Universität Berlin - Hardenbergstr. 36, 10623 Berlin, Germany
(b) E-mail: email@example.com (corresponding author)
Received: 22 February 2023
Accepted: 10 May 2023
Swirling groups of animals or bacteria are a common phenomenon in nature. It is thought that this collective organization occurs in the vicinity of a continuous transition between dynamic states to ensure robust group cohesion while allowing for high sensitivity to outside stimuli like predators. Here, we present Brownian dynamics simulations of active particles with social interactions which can form stable swirls. We observe a transition between swarming and swirling states and analyze these using a sixth-order Landau-type model. Our results suggest that the transition is weakly discontinuous. However, by lowering the rotational diffusion coefficient, it becomes continuous.
© 2023 The author(s)
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