Relevance of Metric-Free Interactions in Flocking Phenomena

Francesco Ginelli, Hugues Chate

Research output: Contribution to journalArticlepeer-review

162 Citations (Scopus)


We show that the collective properties of self-propelled particles aligning with their topological (Voronoi) neighbors are qualitatively different from those of usual models where metric interaction ranges are used. This relevance of metric-free interactions, shown in a minimal setting, indicate that realistic models for the cohesive motion of cells, bird flocks, and fish schools may have to incorporate them, as suggested by recent observations.

Original languageEnglish
Article number168103
Number of pages4
JournalPhysical Review Letters
Issue number16
Early online date13 Oct 2010
Publication statusPublished - 15 Oct 2010


  • phase-transition
  • schools
  • field
  • model


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