Dynamics and rheology of active glasses

2014/03/04 by T. F. F. Farage, Farage, T. F. F., J. M. Brader +1
Computer Science · Engineering · #Adhesion, Friction, and Surface Interactions #Computer Graphics and Visualization Techniques #FOS: Physical sciences #Soft Condensed Matter (cond-mat.soft)

paper · pdf · doi:10.48550/arxiv.1403.0928

openalex publication_date 2014/03/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Within the framework of mode-coupling theory, we present a simple model for describing dense assemblies of active (self-propelled) spherical colloidal particles. For isotropic suspensions, we demonstrate that the glass transition is shifted to higher volume fraction by the addition of activity, in agreement with recent Brownian dynamics simulations. Activity-induced changes in the static structure factor of the fluid are predicted. The mechanical response of an active glass to applied strain is shown to be softer than the corresponding passive glass; both the nonergodicity parameter and the yield stress reduce with increasing activity.

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