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 (5)

• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• 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?
• Sedimentation, trapping, and rectification of dilute bacteria
• Self-Starting Micromotors in a Bacterial Bath

Cited by in corpus (34)

• Multidimensional Stationary Probability Distribution for Interacting Active Particles
• Generalized energy equipartition in harmonic oscillators driven by active baths
• Time-(ir)reversibility in active matter: from micro to macro
• Escape rate of active particles in the effective equilibrium approach
• Disordered collective motion in dense assemblies of persistent particles
• Active Brownian particles and run-and-tumble particles separate inside a maze
• Invariance properties of bacterial random walks in complex structures
• Ratchet transport powered by chiral active particles
• How irreversible are steady-state trajectories of a trapped active particle?
• Critical active dynamics is captured by a colored-noise driven field theory
• Irreversibility in active matter: General framework for active Ornstein-Uhlenbeck particles
• Transport of underdamped active particles in ratchet potentials
• Tractionless Self-Propulsion of Active Drops
• Motility versus fluctuations in mixtures of self-propelled and passive agents
• Sampling efficiency of transverse forces in dense liquids
• Run-and-tumble motion in a linear ratchet potential: Analytic solution, power extraction, and first-passage properties
• 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
• 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
• Effects of the self-propulsion parity on the efficiency of a fuel-consuming active heat engine
• Topologically controlled synthesis of active colloidal bipeds
• Escape Dynamics in an Anisotropically Driven Brownian Magneto-System
• Dynamic-OCT simulation framework based on mathematical models of intratissue dynamics, image formation, and measurement noise
• Exact results for sheared polar active suspensions with variable liquid crystalline order
• Curvature induces and enhances transport of spinning colloids through narrow channels
• Long time behavior of run-and-tumble particles in two dimensions
• 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
• Universal framework for the long-time position distribution of free active particles
• Configurational Entropy of Self Propelled Glass Formers
• Individual particle persistence antagonizes global ordering in populations of nematically-aligning self-propelled particles
• Effective diffusion of a tracer in active bath: a path-integral approach