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Journal articles
Collective Motion of Self-Propelled Particles with Memory
Abstract : We show that memory, in the form of underdamped angular dynamics, is a crucial ingredient for the collective properties of self-propelled particles. Using Vicsek-style models with an Ornstein-Uhlenbeck process acting on angular velocity, we uncover a rich variety of collective phases not observed in usual overdamped systems, including vortex lattices and active foams. In a model with strictly nematic interactions the smectic arrangement of Vicsek waves giving rise to global polar order is observed. We also provide a calculation of the effective interaction between vortices in the case where a telegraphic noise process is at play, explaining thus the emergence and structure of the vortex lattices observed here and in motility assay experiments.
Cited literature [26 references]
https://hal-cea.archives-ouvertes.fr/cea-01367162
Contributor : Dominique Girard <>
Submitted on : Thursday, September 15, 2016 - 4:52:56 PM
Last modification on : Monday, February 10, 2020 - 6:12:21 PM
Long-term archiving on: : Friday, December 16, 2016 - 3:40:20 PM
Contributor : Dominique Girard <>
Submitted on : Thursday, September 15, 2016 - 4:52:56 PM
Last modification on : Monday, February 10, 2020 - 6:12:21 PM
Long-term archiving on: : Friday, December 16, 2016 - 3:40:20 PM
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PhysRevLett.114.168001.pdf
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