Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 64: Poster: Active Matter and Microswimmers (joint session DY/TT)

TT 64.4: Poster

Donnerstag, 19. März 2020, 15:00–18:00, P1A

Shearing an Active Glass — •Rituparno Mandal1 and Peter Sollich1,21Institut für Theoretische Physik, Göttingen, Germany — 2King's College London, London, United Kingdom

Recent experiments and simulations have revealed glassy features of cytoplasm, tissues and dense assemblies of self propelled colloids. This prompts the fundamental question of whether non-equilibrium (active) amorphous materials are essentially equivalent to their passive counterparts, or whether they can present qualitatively different behaviour. To tackle this challenge we investigate the yielding and mechanical behaviour of a model active glass former, a Kob-Andersen glass in two dimensions where each particle is driven by a constant propulsion force whose direction varies diffusively over time. Using extensive Molecular Dynamics simulations, we focus in particular on the effects of the intermittent dynamics in the regime of highly persistent activity and reveal a novel type of shear induced orientational ordering in the system.

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