Directed transport of active particles over asymmetric energy barriers

Abstract

We theoretically and numerically investigate the transport of active colloids to target regions, delimited by asymmetric energy barriers. We show that it is possible to introduce a generalized effective temperature that is related to the local variance of particle velocities. The stationary probability distributions can be derived from a simple diffusion equation in the presence of an inhomogeneous effective temperature resulting from the action of external force fields. In particular, transitions rates over asymmetric energy barriers can be unbalanced by having different effective temperatures over the two slopes of the barrier. By varying the type of active noise, we find that equal values of diffusivity and persistence time may produce strongly varied effective temperatures and thus stationary distributions.

References in corpus (13)

• Brownian motors: noisy transport far from equilibrium
• Active Brownian Particles. From Individual to Collective Stochastic Dynamics
• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• A bacterial ratchet motor
• Sedimentation of active colloidal suspensions
• When are active Brownian particles and run-and-tumble particles equivalent? Consequences for motility-induced phase separation
• Diffusive transport without detailed balance in motile bacteria: Does microbiology need statistical physics?
• A continuum theory of phase separation kinetics for active Brownian particles
• Sedimentation, trapping, and rectification of dilute bacteria
• Self-Starting Micromotors in a Bacterial Bath
• Non-Gaussian statistics for the motion of self-propelled Janus particles: experiment versus theory
• Colloids in a bacterial bath: simulations and experiments
• Motility fractionation of bacteria by centrifugation

Cited by in corpus (64)

• Active Particles in Complex and Crowded Environments
• How far from equilibrium is active matter?
• Statistical Mechanics of Active Ornstein Uhlenbeck Particles
• Multidimensional Stationary Probability Distribution for Interacting Active Particles
• Irreversibility in active matter systems: Fluctuation theorem and mutual information
• Generalized energy equipartition in harmonic oscillators driven by active baths
• Cluster phases and bubbly phase separation in active fluids: Reversal of the Ostwald process
• Active particles with soft and curved walls: Equation of state, ratchets, and instabilities
• Towards a statistical mechanical theory of active fluids
• Light-induced self-assembly of active rectification devices
• Time-(ir)reversibility in active matter: from micro to macro
• Entrainment dominates the interaction of microalgae with micron-sized objects
• Autonomous engines driven by active matter: Energetics and design principles
• Escape rate of active particles in the effective equilibrium approach
• Origins and diagnostics of the nonequilibrium character of active systems
• Disordered collective motion in dense assemblies of persistent particles
• Active engines: Thermodynamics moves forward
• Active Brownian particles and run-and-tumble particles separate inside a maze
• The active trap model
• Nonlocal stationary probability distributions and escape rates for an active Ornstein-Uhlenbeck particle
• Active dumbbells: dynamics and morphology in the coexisting region
• Invariance properties of bacterial random walks in complex structures
• Pressure and Flow of Exponentially Self-Correlated Active Particles
• Ratchet transport powered by chiral active particles
• How irreversible are steady-state trajectories of a trapped active particle?
• Critical Phenomena in Active Matter
• Critical active dynamics is captured by a colored-noise driven field theory
• Irreversibility in active matter: General framework for active Ornstein-Uhlenbeck particles
• Effective potential method for active particles
• AOUP in the presence of Brownian noise: a perturbative approach
• Transport of underdamped active particles in ratchet potentials
• Multiplex decomposition of non-Markovian dynamics and the hidden layer reconstruction problem
• Non-Gaussian noise without memory in active matter
• Motility versus fluctuations in mixtures of self-propelled and passive agents
• Tractionless Self-Propulsion of Active Drops
• Run-and-tumble motion in a linear ratchet potential: Analytic solution, power extraction, and first-passage properties
• Sampling efficiency of transverse forces in dense liquids
• Shape matters: A Brownian microswimmer in a channel
• Transport of the moving barrier driven by chiral active particles
• How many ways a cell can move: the modes of self-propulsion of an active drop
• Effects of hydrodynamic interactions on rectified transport of self-propelled particles
• How to Study a Persistent Active Glassy System?
• Statistical Field Theory and Effective Action Method for scalar Active Matter
• Currents and flux-inversion in photokinetic active particles
• Work Fluctuations in the Active Ornstein- Uhlenbeck Particle model
• Energetics of critical oscillators in active bacterial baths
• Simultaneous and independent topological control of identical microparticles in non-periodic energy landscapes
• Memory Effects in Active Particles with Exponentially Correlated Propulsion
• Ratchet-induced variations in bulk states of an active ideal gas
• Effects of the self-propulsion parity on the efficiency of a fuel-consuming active heat engine
• Dynamic-OCT simulation framework based on mathematical models of intratissue dynamics, image formation, and measurement noise
• Topologically controlled synthesis of active colloidal bipeds
• Escape Dynamics in an Anisotropically Driven Brownian Magneto-System
• Curvature induces and enhances transport of spinning colloids through narrow channels
• Exact results for sheared polar active suspensions with variable liquid crystalline order
• Long time behavior of run-and-tumble particles in two dimensions
• Climbing two hills is faster than one: collective barrier-crossing by colloids driven through a microchannel
• Ratchet effect and jamming in dense mixtures of active and passive colloids in narrow pores
• Jamming of active particles in narrow pores: Implications for ratchet effect and diffusion coefficient
• Collective Transport of Lennard-Jones Particles through One-Dimensional Periodic Potentials
• Universal framework for the long-time position distribution of free active particles
• Configurational Entropy of Self Propelled Glass Formers
• Effective diffusion of a tracer in active bath: a path-integral approach
• Individual particle persistence antagonizes global ordering in populations of nematically-aligning self-propelled particles