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  • Title: Chaotic Model for Lévy Walks in Swarming Bacteria.
    Author: Ariel G, Be'er A, Reynolds A.
    Journal: Phys Rev Lett; 2017 Jun 02; 118(22):228102. PubMed ID: 28621992.
    Abstract:
    We describe a new mechanism for Lévy walks, explaining the recently observed superdiffusion of swarming bacteria. The model hinges on several key physical properties of bacteria, such as an elongated cell shape, self-propulsion, and a collectively generated regular vortexlike flow. In particular, chaos and Lévy walking are a consequence of group dynamics. The model explains how cells can fine-tune the geometric properties of their trajectories. Experiments confirm the spectrum of these patterns in fluorescently labeled swarming Bacillus subtilis.
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