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Communication Dans Un Congrès Année : 2022

Noise-induced breakdown in single-file motion

Résumé

Self-driven particle systems can describe many self-organized phenomena. Prominent examples are oscillation, wave, lane, or band formations, among other swarming and coordinated movements. Collective dynamics are classically understood in the literature of active matter as motility-induced phase separation using meta-stable non-linear interaction models. Critical settings of the parameters separate the disorder states from non-uniform dynamics describing macroscopic patterns and structures. We show in this contribution that noise effects can initiate the spontaneous formation of waves in single-file motions of self-driven particles. In contrast to usual modeling approaches, no non-linear interaction mechanisms or phase transitions are necessary to coordinate the dynamics. The stochastic effects initiate the self-organization in the second order in a purely linear and ergodic framework. The coupling of the noise to a discrete gradient in space yields the emergence of stop-and-go waves, which we characterize using speed and spacing auto-correlation functions. Varying the characteristics of the noise allows for obtaining rich dynamics ranging from coupled dynamics and stable homogeneous dynamics to stop-and-go patterns with deterministic oscillating features.
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Dates et versions

hal-03794120 , version 1 (03-10-2022)

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  • HAL Id : hal-03794120 , version 1

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Jakob Cordes, Andreas Schadschneider, Antoine Tordeux. Noise-induced breakdown in single-file motion. 18ième Journées de la Matière Condensée (JMC18), Aug 2022, Lyon, France. ⟨hal-03794120⟩

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