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P: Fachverband Plasmaphysik

P 27: Theory of nonideal Plasmas

P 27.4: Hauptvortrag

Freitag, 21. März 2014, 11:30–12:00, SPA HS201

Theory of high energy density matter — •Jan Vorberger — Max-Planck-Institut für die Physik komplexer Systeme, Dresden, Germany

High energy density matter naturally occurs in the interior of planets. It is created in laboratories to experiment on fusion for energy production and to study these novel states in detail. Densities for this state of matter routinely exceed those of known solid materials but there is a lack of long range order in the ionic subsystem. The electrons are partially degenerate and contribute the main part of the pressure of the system. Ionization is a very dynamic phenomenon and is controlled by a complex interplay of temperature and pressure ionization, and changing electronic states. Here, it is shown how a body of knowledge for this state of matter was generated by a combination of new experimental capabilities and new theoretical methods over the last 10 years. It is demonstrated, how a precise modelling of the electronic structure factor leads to an unprecedented accuracy of measurements of the ion structure, the equation of state, and energy relaxation properties. Such possibilities then lead to new and exciting ways to test the latest heoretical predictions. These rely heavily on finite temperature density functional molecular dynamic simulations, a widely employed tool, as well as on more traditional quantum statistics methods. Their advantages and shortcomings are discussed and possibilities of the new x-ray free electron lasers are sketched to advance the theoretical modelling of high energy density matter.