How to study a persistent active glassy system

TY - JOUR

T1 - How to study a persistent active glassy system

AU - Mandal, Rituparno

AU - Sollich, Peter

N1 - Funding Information: This project has received funding from the European Union s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant agreement No. 893128. This research was supported in part by the National Science Foundation under Grant No. NSF PHY-1748958. Publisher Copyright: © 2021 IOP Publishing Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/5

Y1 - 2021/5

N2 - We explore glassy dynamics of dense assemblies of soft particles that are self-propelled by active forces. These forces have a fixed amplitude and a propulsion direction that varies on a timescale τp, the persistence timescale. Numerical simulations of such active glasses are computationally challenging when the dynamics is governed by large persistence times. We describe in detail a recently proposed scheme that allows one to study directly the dynamics in the large persistence time limit, on timescales around and well above the persistence time. We discuss the idea behind the proposed scheme, which we call “activity-driven dynamics”, as well as its numerical implementation. We establish that our prescription faithfully reproduces all dynamical quantities in the appropriate limit τp → ∞. We deploy the approach to explore in detail the statistics of Eshelby-like plastic events in the steady state dynamics of a dense and intermittent active glass.

AB - We explore glassy dynamics of dense assemblies of soft particles that are self-propelled by active forces. These forces have a fixed amplitude and a propulsion direction that varies on a timescale τp, the persistence timescale. Numerical simulations of such active glasses are computationally challenging when the dynamics is governed by large persistence times. We describe in detail a recently proposed scheme that allows one to study directly the dynamics in the large persistence time limit, on timescales around and well above the persistence time. We discuss the idea behind the proposed scheme, which we call “activity-driven dynamics”, as well as its numerical implementation. We establish that our prescription faithfully reproduces all dynamical quantities in the appropriate limit τp → ∞. We deploy the approach to explore in detail the statistics of Eshelby-like plastic events in the steady state dynamics of a dense and intermittent active glass.

UR - http://www.scopus.com/inward/record.url?scp=85105432185&partnerID=8YFLogxK

U2 - 10.1088/1361-648X/abef9b

DO - 10.1088/1361-648X/abef9b

M3 - Article

SN - 0953-8984

VL - 33

JO - JOURNAL OF PHYSICS CONDENSED MATTER

JF - JOURNAL OF PHYSICS CONDENSED MATTER

IS - 18

M1 - 184001

ER -