Abstract
Recent numerical studies have identified the persistence time of active motion as a critical parameter governing glassy dynamics in dense active matter. Here we studied dynamics in liquids of granular active ellipsoids with tunable persistence and velocity. We show that increasing the persistence time at moderate supercooling is equivalent to increasing the strength of attraction in equilibrium liquids and results in reentrant dynamics not just in the translational degrees of freedom, as anticipated, but also in the orientational ones. However, at high densities, motile topological defects, unique to active liquids of elongated particles, hindered dynamical arrest. Most remarkably, for the highest activity, we observed intermittent dynamics due to the jamming-unjamming of these defects for the first time.
- Received 2 November 2021
- Accepted 22 March 2022
- Corrected 13 May 2022
DOI:https://doi.org/10.1103/PhysRevLett.128.178002
© 2022 American Physical Society
Physics Subject Headings (PhySH)
Corrections
13 May 2022
Correction: A missing source listing has been added to Ref. [43].
synopsis
Defects Help 3D-Printed Particles Keep on Swirling
Published 28 April 2022
At packing densities where particles in many liquid-like systems stop moving, 3D-printed ellipsoids can keep scuttling because of the presence of packing “defects.”
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