Generic long-range interactions between passive bodies in an active fluid

Abstract

Because active particles break time-reversal symmetry, a single non-spherical body placed in an active fluid generates currents. We show that when two or more passive bodies are placed in an active fluid these currents lead to long-range interactions. Using a multipole expansion we characterize their leading-order behaviors in terms of single-body properties and show that they decay as a power law with the distance between the bodies, are anisotropic, and do not obey an action--reaction principle. The interactions lead to rich dynamics of the bodies, illustrated by the spontaneous synchronized rotation of pinned non-chiral bodies and the formation of traveling bound pairs. The occurrence of these phenomena depends on tunable properties of the bodies, thus opening new possibilities for self-assembly mediated by active fluids.

21 pages, 6 figures

References in corpus (19)

• Novel type of phase transition in a system of self-driven particles
• Motility-Induced Phase Separation
• When are active Brownian particles and run-and-tumble particles equivalent? Consequences for motility-induced phase separation
• Pressure and Phase Equilibria in Interacting Active Brownian Spheres
• Collective motion and nonequilibrium cluster formation in colonies of gliding bacteria
• Sedimentation, trapping, and rectification of dilute bacteria
• Effective Interactions in Active Brownian Suspensions
• Self-Starting Micromotors in a Bacterial Bath
• Towards a 'Thermodynamics' of Active Matter
• Multidimensional Stationary Probability Distribution for Interacting Active Particles
• Nonequilibrium equation of state in suspensions of active colloids
• Transport powered by bacterial turbulence
• Tunable long range forces mediated by self-propelled colloidal hard spheres
• Active vs. Passive Hard Disks Against a Membrane : Mechanical Pressure and Instability
• Self-assembly of Active Colloidal Molecules with Dynamic Function
• Curvature Induced Activation of a Passive Tracer in an Active Bath
• Mechanical pressure and momentum conservation in dry active matter
• Pressure and Flow of Exponentially Self-Correlated Active Particles
• Memory Effects in Active Particles with Exponentially Correlated Propulsion

Cited by in corpus (49)

• Topological active matter
• Odd Viscosity and Odd Elasticity
• Time-(ir)reversibility in active matter: from micro to macro
• Non-reciprocity across scales in active mixtures
• The Anomalous Transport of Tracers in Active Baths
• Fluctuating motion in an active environment
• Collective forces in scalar active matter
• Nonlocal stationary probability distributions and escape rates for an active Ornstein-Uhlenbeck particle
• Active phase separation: new phenomenology from non-equilibrium physics
• Disorder-Induced Long-Ranged Correlations in Scalar Active Matter
• Dynamic clustering of passive colloids in dense suspensions of motile bacteria
• Non-reciprocal frustration: time crystalline order-by-disorder phenomenon and a spin-glass-like state
• On the Einstein relation between mobility and diffusion coefficient in an active bath
• Disordered boundaries destroy bulk phase separation in scalar active matter
• Surface Tensions between Active Fluids and Solid Interfaces: bare vs dressed
• Small Obstacle in a Large Polar Flock
• Inclusions, Boundaries and Disorder in Scalar Active Matter
• Effective Langevin equations for a polar tracer in an active bath
• Bodies in an Interacting Active Fluid: Far-Field Influence of a Single Body and Interaction Between Two Bodies
• Ramifications of disorder on active particles in one dimension
• Exact coherent structures and phase space geometry of pre-turbulent 2D active nematic channel flow
• Long-Range Nematic Order in Two-Dimensional Active Matter
• Vorticity Determines the Force on Bodies Immersed in Active Fluids
• Confinement-induced alternating interactions between inclusions in an active fluid
• Steady states of active Brownian particles interacting with boundaries
• Unfolding of a diblock chain and its anomalous diffusion induced by active particles
• Response of active Brownian particles to boundary driving
• Effective forces between active polymers
• Enhanced orientational ordering induced by active yet isotropic bath
• Ratchet-induced variations in bulk states of an active ideal gas
• Kinetic temperature and pressure of an active Tonks gas
• Sociohydrodynamics: data-driven modelling of social behavior
• Effective interactions mediated between two permeable disks in an active fluid
• Nematic Torques in Scalar Active Matter: when Fluctuations Favor Polar Order and Persistence
• Breakdown of effective temperature, power law interactions and self-propulsion in a momentum conserving active fluid
• Passive objects in confined active fluids: a localization transition
• Active Nematic Multipoles: Flow Responses and the Dynamics of Defects and Colloids
• Activated diffusiophoresis
• The induced friction on a probe moving in a nonequilibrium medium
• Algebraic depletion interactions in two-temperature mixtures
• A Cold Tracer in a Hot Bath: In and Out of Equilibrium
• Effective Energy, Interactions And Out Of Equilibrium Nature Of Scalar Active Matter
• Long-range influence of a pump on a critical fluid
• Simple fluid with broken time reversal invariance
• Stabilization in the eye of a cyclone
• Boundary layers, transport and universal distribution in boundary driven active systems
• Externally driven condensates show translation-induced polarization, directed coalescence, and anomalous diffusion in viscoelastic media
• Noncentral forces mediated between inclusions in a bath of active Brownian rods
• Effective single component description of steady state structures of passive particles in an active bath