Velocity autocorrelation functions of dusty particles obtained by the Langevin dynamics

摘要

Velocity autocorrelation functions of dusty particles obtained based on the Langevin dynamicsrnsimulations are investigated. The potential of interaction between dust particles is the Yukawarnpotential. Autocorrelation function decay times are analyzed for different coupling, screening andrnfriction parameters. It is shown that at the samernΓ and κ but different θ the autocorrelationrnfunction and oscillations on it (at large coupling parameter) decay more rapidly at higher frictionrnparameters. The comparisons with results of MD simulation were performed. One can see thatrnwith decreasing of the friction parameter results of present paper tend to data obtained in MD simulation.