Collective Motion and Nonequilibrium Cluster Formation in Colonies of Gliding 
Bacteria

Peruani, F.; Starruss, J.; Jakovljevic, V.; Sogaard-Andersen, L.; Deutsch, A.; Bar, M.

doi:10.1103/physrevlett.108.098102

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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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引用

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):. doi:10.1103/physrevlett.108.098102.

引用: https://hdl.handle.net/21.11116/0000-0007-C109-5

要旨

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.