Thermodynamic and transport coefficients from the dynamic structure factor of Yukawa liquids

Abstract

The ion-ion dynamic structure factor (DSF) of warm dense matter and dense plasmas contains information on collective ionic modes and various thermodynamic and transport coefficients, which are important for modeling the interiors of giant planets or the dense plasmas occurring in inertial confinement fusion. Here, it is demonstrated, using the Yukawa liquid as a reduced model, that the complete hydrodynamic information encoded in the DSF can be extracted with an accuracy comparable to that of dedicated methods. This is achieved by applying a generalized hydrodynamic and a viscoelastic model and extrapolating the results at finite wave numbers into the hydrodynamic limit. Very good agreement with previous data is obtained for the sound speed and the viscosity. The thermal diffusivities deduced from different methods exhibit somewhat larger deviations.