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Active fluids operate by constantly dissipating energy at the particle levelto perform a directed motion, yielding dynamics and phases without anyequilibrium equivalent. The emerging behaviors have been studied extensively,yet deciphering how local energy fluxes control the collective phenomena isstill largely an open challenge. We provide generic relations between theactivity-induced dissipation and the transport properties of an internaltracer. By exploiting a mapping between active fluctuations and disordereddriving, our results reveal how the local dissipation, at the basis ofself-propulsion, constrains internal transport by reducing the mobility and thediffusion of particles. Then, we employ techniques of large deviations toinvestigate how interactions are affected when varying dissipation. This leadsus to shed light on a microscopic mechanism to promote clustering at lowdissipation, and we also show the existence of collective motion at highdissipation. Overall, these results illustrate how tuning dissipation providesan alternative route to phase transitions in active fluids.

Dissipation controls transport and phase transitions in active fluids: Mobility, diffusion and biased ensembles