Emergent short-range repulsion for attractively coupled active particles
arXiv:2412.12934 · doi:10.1039/D5SM00137D
Abstract
We show that heterogeneity in self-propulsion speed can lead to the emergence of a robust effective short-range repulsion among active particles interacting via long-range attractive potentials. Using the example of harmonically coupled active Brownian particles, we analytically derive the stationary distribution of the pairwise distances and reveal that the heterogeneity in propulsion speeds induces a characteristic scale of repulsion between particles. This length scale algebraically increases with the difference in their self-propulsion speeds. In contrast to the conventional view that activity in active matter systems typically leads to effective attraction, our results demonstrate that activity can give rise to an emergent repulsive interaction. This phenomenon is universal, independent of the specific dynamics of the particles or the presence of thermal fluctuations. We also discuss possible experimental realization of this counter-intuitive phenomenon.
References in corpus (42)
- Novel type of phase transition in a system of self-driven particles
- Stochastic thermodynamics, fluctuation theorems, and molecular machines
- Active Particles in Complex and Crowded Environments
- Collective motion
- The Mechanics and Statistics of Active Matter
- Motility-Induced Phase Separation
- Physics of Microswimmers - Single Particle Motion and Collective Behavior
- Statistical Mechanics of Interacting Run-and-Tumble Bacteria
- Full phase diagram of active Brownian disks: from melting to motility-induced phase separation
- Effective Interactions in Active Brownian Suspensions
- The statistical physics of active matter: from self-catalytic colloids to living cells
- Inertial effects of self-propelled particles: from active Brownian to active Langevin motion
- Freezing and phase separation of self-propelled disks
- Steady state, relaxation and first-passage properties of a run-and-tumble particle in one-dimension
- Spontaneous velocity alignment in Motility-induced Phase Separation
- Model of collective fish behavior with hydrodynamic interactions
- Interrupted Motility Induced Phase Separation in Aligning Active Colloids
- Active Brownian Motion in Two Dimensions
- Non-Gaussian statistics for the motion of self-propelled Janus particles: experiment versus theory
- Time-(ir)reversibility in active matter: from micro to macro
- Jamming and Attraction of Interacting Run-and-Tumble Random Walkers
- Steady State of an Active Brownian Particle in Two-Dimensional Harmonic Trap
- Long time position distribution of an active Brownian particle in two dimensions
- Sorting motile rods by activity
- Trapping and sorting active particles: motility-induced condensation & smectic defects
- Active Brownian Motion with Directional Reversals
- Exact Solution of Two Interacting Run-and-Tumble Random Walkers with Finite Tumble Duration
- Exact spectral solution of two interacting run-and-tumble particles on a ring lattice
- Active particles in geometrically confined viscoelastic fluids
- Active Colloids in Harmonic Optical Potentials
- Non-equilibrium Properties of an Active Nanoparticle in a Harmonic Potential
- Effective potential method for active particles
- Stationary nonequilibrium bound state of a pair of run and tumble particles
- Gap statistics of two interacting run and tumble particles in one dimension
- Programming tunable active dynamics in a self-propelled robot
- Nonexistence of motility induced phase separation transition in one dimension
- Jamming of multiple persistent random walkers in arbitrary spatial dimension
- Tuning attraction and repulsion between active particles through persistence
- Polar swimmers induce several phases in active nematics
- Characterizing Different Motility Induced Regimes in Active Matter with Machine Learning and Noise
- From a microscopic solution to a continuum description of active particles with a recoil interaction in one dimension
- How motility affects Ising transitions