Concentration dependence of the collective dynamics of swimming bacteria

Andrey Sokolov, Igor S. Aranson, John O. Kessler, Raymond E. Goldstein

Research output: Contribution to journalArticlepeer-review

498 Scopus citations


At concentrations near the maximum allowed by steric repulsion, swimming bacteria form a dynamical state exhibiting extended spatiotemporal coherence. The viscous fluid into which locomotive energy of individual microorganisms is transferred also carries interactions that drive the coherence. The concentration dependence of correlations in the collective state is probed here with a novel technique that herds bacteria into condensed populations of adjustable concentration. For the particular thin-film geometry employed, the correlation lengths vary smoothly and monotonically through the transition from individual to collective behavior.

Original languageEnglish (US)
Article number158102
JournalPhysical review letters
Issue number15
StatePublished - Apr 11 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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