Tagged-particle motion in quasi-confined colloidal hard-sphere liquids

We investigate the tagged-particle motion in a strongly interacting quasi-confined liquid using periodic boundary conditions along the confining direction. Within a mode-coupling theory of the glass transition we calculate the self-nonergodicity parameters and the self-intermediate scattering function and compare them with event-driven molecular dynamics simulations. We observe non-monotonic behavior for the in-plane mean-square displacement and further correlation functions which refer to higher mode indices encoding information about the perpendicular motion. The in-plane velocity-autocorrelation function reveals persistent anti-correlations with a negative algebraic power-law decay t(-2) at all packing fractions.

Automated summary

In this study, the motion of tagged particles in a strongly interacting quasi-confined liquid was investigated using periodic boundary conditions. The calculations were based on mode-coupling theory of the glass transition and comparisons were made with event-driven molecular dynamics simulations. The results showed non-monotonic behavior in the in-plane mean-square displacement and correlations related to perpendicular motion.