G
Guillaume Grégoire
Researcher at Paris Diderot University
Publications - 30
Citations - 3723
Guillaume Grégoire is an academic researcher from Paris Diderot University. The author has contributed to research in topics: Shear flow & Turbulence. The author has an hindex of 19, co-authored 30 publications receiving 3344 citations. Previous affiliations of Guillaume Grégoire include University of Paris.
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Journal ArticleDOI
Onset of collective and cohesive motion.
Guillaume Grégoire,Hugues Chaté +1 more
TL;DR: It is found that this phase transition, in two space dimensions, is always discontinuous, including for the minimal model of Vicsek et al. for which a nontrivial critical point was previously advocated.
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Collective motion of self-propelled particles interacting without cohesion.
TL;DR: The onset of collective motion in Vicsek-style self-propelled particle models in two and three space dimensions is studied in detail and shown to be discontinuous (first-order-like), and the properties of the ordered, collectively moving phase are investigated.
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Modeling collective motion: variations on the Vicsek model
TL;DR: In this article, the authors argue that the model introduced by Vicsek et al. in which self-propelled particles align locally with neighbors is central to most studies of collective motion or "active" matter.
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Boltzmann and hydrodynamic description for self-propelled particles.
TL;DR: A homogeneous spontaneous motion emerges below a transition line in the noise-density plane, and is shown to be unstable against spatial perturbations, suggesting that more complicated structures should eventually appear.
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Hydrodynamic equations for self-propelled particles: microscopic derivation and stability analysis
TL;DR: In this article, the authors derived the hydrodynamic equations governing the density and velocity fields from the microscopic dynamics, in the framework of the associated Boltzmann equation, and showed that the homogeneous flow is found to be stable far from the transition line, but it becomes unstable with respect to finite-wavelength perturbations close to the transition.