Active Glass: Ergodicity Breaking Dramatically Affects Response to Self-Propulsion.

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ID: 80311
2019
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Abstract
We study experimentally the response of a dense sediment of Brownian particles to self-propulsion. We observe that the ergodic supercooled liquid relaxation is monotonically enhanced by activity. By contrast the nonergodic glass shows an order of magnitude slowdown at low activities with respect to the passive case, followed by fluidization at higher activities. Our results contrast with theoretical predictions of the ergodic approach to glass transition, summing up to a shift of the glass line. We propose that nonmonotonicity is due to competing effects of activity: (i) extra energy that helps breaking cages; (ii) directionality that hinders cage exploration. We call it "deadlock from the emergence of active directionality." It suggests further theoretical works should include thermal motion.
Reference Key
klongvessa2019activephysical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Klongvessa, Natsuda;Ginot, Félix;Ybert, Christophe;Cottin-Bizonne, Cécile;Leocmach, Mathieu;
Journal physical review letters
Year 2019
DOI
10.1103/PhysRevLett.123.248004
URL
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