The transport fo self-propelled particles confined in 2D smooth corrugated channel

TL;DR

This study investigates how self-propelled ellipsoidal particles move in a 2D corrugated channel with asymmetric potential and colored noise, revealing how noise intensity, bottleneck size, load, and particle shape influence directed transport.

Contribution

It provides new insights into the effects of channel geometry, noise, and particle shape on the directed transport of self-propelled particles in confined environments.

Findings

Large x-axis noise inhibits transport.

Optimal y-axis noise maximizes transport speed.

Bottleneck size critically affects transport efficiency.

Abstract

Directed transport of self-propelled ellipsoidal particles confined in a smooth corrugated channel with asymmetric potential and Gaussian colored noise is investigated. Effects of the channel, potential and colored noise on the system are discussed. Large x axis noise intensity inhibits the transport. The directed transport speed has a maximum with increasing y axis noise intensity. Proper size of the bottleneck is good for the directed transport of the ellipsoidal particles, but large and small size of bottleneck inhibits this directed transport. The transport reverse phenomenon appears with increasing load and self-propelled speed. Perfect sphere particle is easier to directed transport than needlelike ellipsoid particle.