Thermodynamic Functions of Dense Quantum Plasmas

In this paper, Green's function technique is applied to calculate the EOS for weakly coupled plasmas. Especially, the Montroll-Ward approximation is used to cover the density-temperature region where correlations as well as Fermi statistics have to be taken into account. First, low and high density expansions for the thermodynamic functions of two-component plasmas are presented. Then, the EOS in Montroll- Ward approximation is calculated by numerical evaluation. Results for hydrogen and for an electron-positron-plasma are given. We compare our numerical results with recent data from quantum simulations and use our EOS-theory to investigate correlation and quantum effects of the mean kinetic energy.