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Emerging active turbulence and chaotic advection in dense active matter
I will show that active mesoscale flows, a.k.a. active turbulence, leading to chaotic advection generically emerge in simple models of active particles leading to streams and vortices reminiscent of multiscale flow patterns in turbulence. The characteristics of these flows do not depend on the specific details of the active fluids, and result from the competition between crowding effects and imposed or emerging persistent propulsions. Our results suggest that dense active fluids present a type of active turbulence distinct from collective flows reported in other types of active and biological systems.