Active particles confined in deformable droplets

Abstract: Active particles under soft confinement such as droplets or vesicles present intriguing phenomena, as collective motion emerges alongside the deformation of the environment. A model is employed to systematically investigate droplet morphology and particle distribution in relation to activity and concentration,revealing that active particles have the capacity to induce enhanced shape fluctuations in the droplet interface with respect to the thermal fluctuations, aligning with recent experimental observations. A rich phase behaviour can be identified with two different mechanism of droplet breakage.