Drift without flux: Brownian walker with a space-dependent diffusion coefficient
Drift without flux: Brownian walker with a space-dependent diffusion coefficient
Space dependent diffusion of micrometer sized particles has been directly observed using digital video microscopy. The particles were trapped between two nearly parallel walls making their confinement position dependent. Consequently, not only did we measure a diffusion coefficient which depended on the particles' position, but also report and explain a …