Ab initio investigation of two temperature warm dense gold.

Understanding the time evolution of the electronic and ionic structure of warm dense gold heated up to the warm dense matter regime by a femtosecond laser pulse is still challenging. Following laser illumination, electronic temperature increases and electron and ion temperatures are different for several ps. The time scale of the equilibration between the two temperatures is still needed. X-Ray absorption near edge spectroscopy (XANES) is a powerfull tool to investigate the electronic properties of two temperature metals and to link ionic and electronic properties. Following a prevoius study on copper, we present here XANES spectra near L-edge for two temperature gold computed using  DFT based  molecular dynamic. We demonstrate how the change in the spectra can be used to interpret future experiments.