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Journal Article

Collective Motion and Nonequilibrium Cluster Formation in Colonies of Gliding Bacteria

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Jakovljevic,  V.
Bacterial Adaption and Differentiation, Department of Ecophysiology, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Sogaard-Andersen,  L.
Bacterial Adaption and Differentiation, Department of Ecophysiology, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Citation

Peruani, F., Starruss, J., Jakovljevic, V., Sogaard-Andersen, L., Deutsch, A., & Bar, M. (2012). Collective Motion and Nonequilibrium Cluster Formation in Colonies of Gliding Bacteria. Physical Review Letters, 108(9): 098102. doi:10.1103/physrevlett.108.098102.


Cite as: https://hdl.handle.net/21.11116/0000-0007-C109-5
Abstract
We characterize cell motion in experiments and show that the transition to collective motion in colonies of gliding bacterial cells confined to a monolayer appears through the organization of cells into larger moving clusters. Collective motion by nonequilibrium cluster formation is detected for a critical cell packing fraction around 17%. This transition is characterized by a scale-free power-law cluster-size distribution, with an exponent 0.88±0.07, and the appearance of giant number fluctuations. Our findings are in quantitative agreement with simulations of self-propelled rods. This suggests that the interplay of self-propulsion and the rod shape of bacteria is sufficient to induce collective motion.