Discontinuous fluidisation transition in assemblies of actively-deforming particles: A new paradigm for collective motion in dense active materials

Abstract

Tracking experiments in dense biological tissues reveal a diversity of sources f or local energy injection at the cell scale. The effect of cell motility has been largely studied, but much less is known abo ut the effect of the observed volume fluctuations of individual cells. We devise a simple microscopic model of `actively-deforming' particles where local fluctuations of the particle size constitute a unique source of motion. We demonstrate that collective motion can emerge under the sole influence of such active volume fluctuations. We interpret the onset of diffusive motion as a nonequilibrium first-order phase transition, which arises at a well-defined amplitude of self-deformation. This behaviour contrasts with the glassy dynamics produced by self-propulsion, but resembles the mechanical response of soft solids under mechanical deformation. It thus constitutes the first example of active yielding transition.

5 pages, 3 figs

References in corpus (4)

• Novel type of phase transition in a system of self-driven particles
• The nonequilibrium glassy dynamics of self-propelled particles
• A microscopic view of the yielding transition in concentrated emulsions
• Volume changes during active shape fluctuations in cells

Cited by in corpus (24)

• Non-Equilibrium Strongly Hyperuniform Fluids of Circle Active Particles with Large Local Density Fluctuations
• Perspective: Nonequilibrium glassy dynamics in dense systems of active particles
• Shaken and stirred: Random organization reduces viscosity and dissipation in granular suspensions
• Classification of the reversible-irreversible transitions in particle trajectories across the jamming transition point
• Perspective on Reversible to Irreversible Transitions in Periodic Driven Many Body Systems and Future Directions For Classical and Quantum Systems
• Pulsating active matter
• Glassy dynamics of a model of bacterial cytoplasm with metabolic activities
• Analogies between growing dense active matter and soft driven glasses
• Diffusion in crowded colloids of particles cyclically changing their shapes
• Non-equilibrium dynamic hyperuniform states
• Harmonic chain far from equilibrium: single-file diffusion, long-range order, and hyperuniformity
• Hyperuniformity and conservation laws in non-equilibrium systems
• Biased ensembles of pulsating active matter
• How does a hyperuniform fluid freeze?
• Nonreciprocal Spin-Glass Transition and Aging
• Criticality at finite strain rate in fluidized soft glassy materials
• Continuous symmetry breaking of low-dimensional systems driven by inhomogeneous oscillatory driving forces
• Diffusive oscillators capture the pulsating states of deformable particles
• Spontaneous Spatiotemporal Ordering of Shape Oscillations Enhances Cell Migration
• Barrier-Controlled Non-Equilibrium Criticality in Reactive Particle Systems
• Controlling the volume fraction of glass-forming colloidal suspensions using thermosensitive host `mesogels'
• Collective dynamics and elasto-chemical cluster waves in communicating colloids with explicit size response
• Active responsive colloids driven by intrinsic dichotomous noise
• Giant fluctuations in the flow of fluidised soft glassy materials: an elasto-plastic modelling approach