May 20 – 22, 2026
Europe/Paris timezone

Active Brownian particles with mean-field interaction: singular interactions and multiple invariant measures

May 22, 2026, 11:45 AM
45m
amphi Schwartz (IMT)

amphi Schwartz

IMT

Speaker

Oscar de Wit

Description

We introduce a mean-field McKean-Vlasov model for a collective of ants. The model sustains two non-trivial dynamical behaviours: aggregation and lane formation. We show the well-posedness and mean-field limit for the particle model with singular interactions via a compactness method. We also show the existence of multiple invariant measures via perturbative Fourier-style bifurcation analysis, reflecting the aggregation and lane formation behaviours (joint work with Matthias Rakotomalala). We conclude with some open problems pertaining to interacting active Brownian particle models.

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