Scaling the glassy dynamics of active particles: Tunable fragility and reentrance

Abstract

Understanding the influence of activity on dense amorphous assemblies is crucial for biological processes such as wound healing, embryogenesis, or cancer progression. Here, we study the effect of self-propulsion forces of amplitude $f_0$ and persistence time ${\tau }_p$ in dense assemblies of soft repulsive particles by simulating a model particle system that interpolates between particulate active matter and biological tissues. We identify the fluid and glass phases of the three-dimensional phase diagram obtained by varying $f_0$, ${\tau }_p$, and the packing fraction $\varphi$. The morphology of the phase diagram directly accounts for a non-monotonic evolution of the relaxation time with ${\tau }_p$, which is a direct consequence of the crossover in the dominant relaxation mechanism, from glassy to jamming. A second major consequence is the evolution of the glassy dynamics from sub-Arrhenius to super-Arrhenius. We show that this tunable glass fragility extends to active systems analogous observations reported for passive particles. This analogy allows us to apply a dynamic scaling analysis proposed for the passive case, in order to account for our results for active systems. Finally, we discuss similarities and differences between our results and recent findings in the context of computational models of biological tissues.

17 pages, including the supplementary material

References in corpus (26)

• Theoretical perspective on the glass transition and amorphous materials
• A self-propelled particle in an external potential: is there an effective temperature?
• Unified study of glass and jamming rheology in soft particle systems
• The glass transition of dense fluids of hard and compressible spheres
• Perspective: Nonequilibrium glassy dynamics in dense systems of active particles
• Glassy dynamics of athermal self-propelled particles: Computer simulations and a nonequilibrium microscopic theory
• Compressing nearly hard sphere fluids increases glass fragility
• How active forces influence nonequilibrium glass transitions
• Mode-Coupling Theory for Active Brownian Particles
• Nonequilibrium mode-coupling theory for dense active systems of self-propelled particles
• Multiple reentrant glass transitions in confined hard-sphere glasses
• A microscopic mean-field theory of the jamming transition
• Effective temperatures in inhomogeneous passive and active bidimensional Brownian particle systems
• Theory and simulation for equilibrium glassy dynamics in cellular Potts model of confluent biological tissue
• Cage Length Controls the Non-Monotonic Dynamics of Active Glassy Matter
• Softness, anomalous dynamics, and fractal-like energy landscape in model cell tissues
• Active Glassy Dynamics is Unaffected by the Microscopic Details of Self-Propulsion
• Intermittent relaxation and avalanches in extremely persistent active matter
• Motile topological defects hinder dynamical arrest in dense liquids of active ellipsoids
• Emergence of bacterial glass
• How to Study a Persistent Active Glassy System?
• Fluid-Glass-Jamming Rheology of Soft Active Brownian Particles
• Mode-coupling theory for mixtures of athermal self-propelled particles
• Generalized Mode-Coupling Theory for Mixtures of Brownian Particles
• Aging or DEAD: origin of the non-monotonic response to weak self-propulsion in active glasses
• Motility driven glassy dynamics in confluent epithelial monolayers

Cited by in corpus (1)

• Yielding in dense active matter