Replication Data for: Splitting probabilities of confined chiral active Brownian particles

Active particles exhibit self-propulsion, leading to transport behavior that differs fundamentally from passive Brownian motion. In confined or structured domains, activity can strongly influence escape probabilities and first-passage behavior. Understanding these effects is essential for describing transport in biological microenvironments, microfluidic devices, and heterogeneous media.

In the associated article, “Splitting probabilities of confined chiral active Brownian particles”, we investigate the splitting probability of active particles in confined domains using the backward Fokker–Planck equation. We consider both a one-dimensional interval and a two-dimensional corrugated channel. Analytical solutions are derived for the one-dimensional case in several asymptotic regimes. For corrugated channels with small aspect ratios, we develop a Fick–Jacobs reduction that yields effective transport equations along the axial direction, while for finite aspect ratios the splitting dynamics are computed numerically.

The results demonstrate how channel geometry, particle activity, and chirality modulate the likelihood of escape through different boundaries.

This repository contains the code and data required to reproduce the results and figures presented in the article “Splitting probabilities of confined chiral active Brownian particles.”