Polar vs. apolar alignment in systems of polar self-propelled particles

Fernando Peruani, Francesco Ginelli, Markus Baer, Hugues Chate

Research output: Chapter in Book/Report/Conference proceedingConference contribution

30 Citations (Scopus)


The symmetry of the alignment mechanism in systems of polar self-propelled particles determines the possible macroscopic large-scale patterns that can emerge. Here we compare polar and apolar alignment. These systems share some common features like giant number fluctuations in the ordered phase and self-segregation in the form of bands near the onset of orientational order. Despite these similarities, there are essential differences like the symmetry of the ordered phase and the stability of the bands.

Original languageEnglish
Title of host publicationStatphys-Kolkata VII
EditorsJK Bhattacharjee, BK Chakrabarti, JI Inoue, P Sen
Place of PublicationBristol
PublisherIOP Publishing Ltd.
Number of pages8
Publication statusPublished - 2011
EventInternational Conference on Statphys Kolkata VII - Kolkata
Duration: 26 Nov 201030 Nov 2010


ConferenceInternational Conference on Statphys Kolkata VII


  • giant number fluctuations
  • collective motion
  • phase-transition
  • order
  • model

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