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Article Dans Une Revue Physical Review Letters Année : 2020

Self-Organized Critical Coexistence Phase in Repulsive Active Particles

Résumé

We revisit motility-induced phase separation in two models of active particles interacting by pairwise repulsion and uncover new qualitative features: the resulting dense phase contains gas bubbles distributed algebraically up to a typically extremely large cutoff scale. At large enough system size and/or global density, all the gas may be contained inside the bubbles, at which point the system is microphase separated with a finite cutoff bubble scale. We further observe that the ordering is clearly anomalous, with different dynamics for the coarsening of the dense phase and of the gas bubbles. This self-organized critical phenomenology is reproduced by a "reduced bubble model" that implements the basic idea of reverse Ostwald ripening put forward in Tjhung et al. [Phys. Rev. X 8, 031080 (2018)].

Dates et versions

cea-04344872 , version 1 (14-12-2023)

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Xia-Qing Shi, Giordano Fausti, Hugues Chaté, Cesare Nardini, Alexandre Solon. Self-Organized Critical Coexistence Phase in Repulsive Active Particles. Physical Review Letters, 2020, 125 (16), pp.168001. ⟨10.1103/PhysRevLett.125.168001⟩. ⟨cea-04344872⟩
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