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Emergent vortices in populations of colloidal rollers

Author

Listed:
  • Antoine Bricard

    (Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon, Université de Lyon and CNRS)

  • Jean-Baptiste Caussin

    (Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon, Université de Lyon and CNRS)

  • Debasish Das

    (University of California, San Diego)

  • Charles Savoie

    (Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon, Université de Lyon and CNRS)

  • Vijayakumar Chikkadi

    (Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon, Université de Lyon and CNRS)

  • Kyohei Shitara

    (Kyushu University 33)

  • Oleksandr Chepizhko

    (Odessa National University
    Université Nice Sophia Antipolis, Laboratoire J.A. Dieudonné)

  • Fernando Peruani

    (Université Nice Sophia Antipolis, Laboratoire J.A. Dieudonné)

  • David Saintillan

    (University of California, San Diego)

  • Denis Bartolo

    (Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon, Université de Lyon and CNRS)

Abstract

Coherent vortical motion has been reported in a wide variety of populations including living organisms (bacteria, fishes, human crowds) and synthetic active matter (shaken grains, mixtures of biopolymers), yet a unified description of the formation and structure of this pattern remains lacking. Here we report the self-organization of motile colloids into a macroscopic steadily rotating vortex. Combining physical experiments and numerical simulations, we elucidate this collective behaviour. We demonstrate that the emergent-vortex structure lives on the verge of a phase separation, and single out the very constituents responsible for this state of polar active matter. Building on this observation, we establish a continuum theory and lay out a strong foundation for the description of vortical collective motion in a broad class of motile populations constrained by geometrical boundaries.

Suggested Citation

  • Antoine Bricard & Jean-Baptiste Caussin & Debasish Das & Charles Savoie & Vijayakumar Chikkadi & Kyohei Shitara & Oleksandr Chepizhko & Fernando Peruani & David Saintillan & Denis Bartolo, 2015. "Emergent vortices in populations of colloidal rollers," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8470
    DOI: 10.1038/ncomms8470
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    Cited by:

    1. C.N., Sachin & Joy, Ashwin, 2022. "Entropy scaling laws in self propelled glass formers," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 588(C).
    2. Michael Riedl & Isabelle Mayer & Jack Merrin & Michael Sixt & Björn Hof, 2023. "Synchronization in collectively moving inanimate and living active matter," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Bo Zhang & Andreas Glatz & Igor S. Aranson & Alexey Snezhko, 2023. "Spontaneous shock waves in pulse-stimulated flocks of Quincke rollers," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    4. Chung Wing Chan & Daihui Wu & Kaiyao Qiao & Kin Long Fong & Zhiyu Yang & Yilong Han & Rui Zhang, 2024. "Chiral active particles are sensitive reporters to environmental geometry," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    5. C.N., Sachin & Joy, Ashwin, 2023. "Configurational entropy of self-propelled glass formers," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 626(C).

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