Electronic Structure and Equation of State of Warm Dense Gold

We present experimental measurements and theoretical estimations of the equation of state and the resistivity of warm dense gold ($\rho$ =0.5 g/cm$^3$). The plasma was obtained in an isochoric plasma closed-vessel (EPI) designed to confine electrical plasma discharge up to 25 kbar. Theoretically, the properties were computed by quantum molecular dynamics simulation in the DFT/LDA approximation. The frequency dependent optical conductivity and the resistivity were evaluated using Kubo-Greenwood formula. The theoretical results reproduce well the experimental data allowing for a detailed interpretation of the theoretical optical conductivities. Drude's law was used to fit this calculated optical conductivities for low frequency to obtained relaxation times and free electrons number.