Collective forces in scalar active matter

Abstract

Large-scale collective behavior in suspensions of many particles can be understood from the balance of statistical forces emerging beyond the direct microscopic particle interactions. Here we review some aspects of the collective forces that can arise in suspensions of self-propelled active Brownian particles: wall forces under confinement, interfacial forces, and forces on immersed bodies mediated by the suspension. Even for non-aligning active particles, these forces are intimately related to a non-uniform polarization of particle orientations induced by walls and bodies, or inhomogeneous density profiles. We conclude by pointing out future directions and promising areas for the application of collective forces in synthetic active matter, as well as their role in living active matter.

the revised version will appear in Soft Matter

References in corpus (34)

• Novel type of phase transition in a system of self-driven particles
• The hydrodynamics of swimming microorganisms
• Self-motile colloidal particles: from directed propulsion to random walk
• Motility-Induced Phase Separation
• Physics of Microswimmers - Single Particle Motion and Collective Behavior
• Pressure and Phase Equilibria in Interacting Active Brownian Spheres
• Phototaxis of synthetic microswimmers in optical landscapes
• Effective Interactions in Active Brownian Suspensions
• Rectification of Swimming Bacteria and Self Driven Particle Systems by Arrays of Asymmetric Barriers
• An introduction to the Ginzburg-Landau theory of phase transitions and nonequilibrium patterns
• Multidimensional Stationary Probability Distribution for Interacting Active Particles
• Active colloidal suspensions: Clustering and phase behavior
• Tunable long range forces mediated by self-propelled colloidal hard spheres
• The role of collective motion in examples of coarsening and self-assembly
• Entropy production of active particles and for particles in active baths
• Dynamical mean-field theory and weakly non-linear analysis for the phase separation of active Brownian particles
• Long time position distribution of an active Brownian particle in two dimensions
• Microscopic Origins of the Swim Pressure and the Anomalous Surface Tension of Active Matter
• Applicability of Effective Pair Potentials for Active Brownian Particles
• Clausius relation for active particles: what can we learn from fluctuations?
• Non-Equilibrium Surface Tension of the Vapour-Liquid Interface of Active Lennard-Jones Particles
• Non-negative Interfacial Tension in Phase-Separated Active Brownian Particles
• Phase coexistence of active Brownian particles
• Activity-Enhanced Self-Assembly of a Colloidal Kagome Lattice
• Elasticity-based polymer sorting in active fluids: A Brownian dynamics study
• The curved kinetic boundary layer of active matter
• Swimming to Stability: Structural and Dynamical Control via Active Doping
• Active hard-spheres in infinitely many dimensions
• Quorum-sensing active particles with discontinuous motility
• Mechanochemical fluctuation theorem and thermodynamics of self-phoretic motors
• Transient Casimir forces from quenches in thermal and active matter
• Systematic extension of the Cahn-Hilliard model for motility-induced phase separation
• How statistical forces depend on thermodynamics and kinetics of driven media
• Three-body correlations and conditional forces in suspensions of active hard disks

Cited by in corpus (29)

• Active phase separation by turning toward regions of higher density
• Power functional theory for many-body dynamics
• The Anomalous Transport of Tracers in Active Baths
• A review of active matter reviews
• Design of nematic liquid crystals to control microscale dynamics
• Active phase separation: new phenomenology from non-equilibrium physics
• Coexistence of active Brownian discs: Van der Waals theory and analytical results
• Critical behavior of active Brownian particles: Connection to field theories
• Thermodynamics of active matter: Tracking dissipation across scales
• Calorimetry for active systems
• Directional Locking Effects for Active Matter Particles Coupled to a Periodic Substrate
• Shape matters: A Brownian microswimmer in a channel
• Force generation in confined active fluids: The role of microstructure
• Phase separation of active Brownian particles in two dimensions: Anything for a quiet life
• Vorticity Determines the Force on Bodies Immersed in Active Fluids
• Confinement-induced alternating interactions between inclusions in an active fluid
• Clogging, Dynamics and Reentrant Fluid for Active Matter on Periodic Substrates
• Universal reshaping of arrested colloidal gels via active doping
• Active Matter Shepherding and Clustering in Inhomogeneous Environments
• Periodic patterns displace active phase separation
• Effective interactions mediated between two permeable disks in an active fluid
• Active Young-Dupré Equation: How Self-organized Currents Stabilize Partial Wetting
• Transient Pattern Formation in an Active Matter Contact Poisoning Model
• Thermodynamic nature of irreversibility in active matter
• Wetting transition of active Brownian particles on a thin membrane
• Active screws: Emergent active chiral nematics of spinning self-propelled rods
• Negative drag force on beating flagellar-shaped bodies in active fluids
• Simulation of a flat folding nano-swimmer confined in a nanopore
• Hydrodynamics of simple active liquids: the emergence of velocity correlations