Spatio-Temporal Dressed Dynamics

A report from K.C. Zhu and H.B. Su on "Generalization of Langevin Dynamics from Spatio-Temporal Dressed Dynamics Perspective"

https://pubs.acs.org/doi/abs/10.1021/acs.jpca.0c00343

Understanding multiscale dynamics characteristics has been the holy grail in a broad range of scientific disciplines from physics, chemistry to biology, and beyond. The seminal Langevin equation successfully unravels remarkable details of Brownian motion dynamics involving stochastic collisions from the fluidic medium. However, extraordinary phenomena beyond the scope of Langevin dynamics were observed to exhibit a series of multiscale dynamic features in recent years. Here, an explicit spatio-temporal coupled kernel is developed to provide the microscopic account for delicate dynamic coupling between particle and medium in the dressed dynamics perspective. This methodology is applied to investigate an aqueous solvation shell model with explicit spatial boundary to illustrate the significance of spatial and temporal coupling leading to general temporal profile of dressed dynamics over 12 orders of magnitude in times. The understanding of dressed dynamics processes will be greatly enriched by further studies on the detailed dynamics that manifests the microscopic inhomogeneity of liquids.