Hannover 2016 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 25: Poster Session- Theory and Modelling

P 25.14: Poster

Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof

Transport properties of dense plasma beyond Born approximation — •Sebastian Rosmej, Heidi Reinholz, and Gerd Röpke — Universität Rostock, Rostock, Deutschland

In the generalized linear response theory, transport coefficients are expressed via correlation functions. Especially the static conductivity of dense plasma is investigated. The main contribution due to electron-ion collisions is well known. Further relevant interactions have to be considered, e.g. electron-electron collisions. Within Born approximation, this was done in a recent paper [1] for arbitrary degeneracy. Assuming statically screened Coulomb potentials a correction factor is deduced. Additionally, the treatment of strong collisions is necessary in the warm dense matter regime. In [2] the T matrix effects are considered for electron-ion interactions. A new fit formula for the electron-ion transport cross section is proposed in order to reduce the numerical effort in the low density limit.

In reference to experimental results the treatment of electron-electron collisions in different approximations is evaluated and especially the influence strong collisions via T matrix is shown in more detail.

[1] H. Reinholz, G. Röpke, S. Rosmej, and R. Redmer, Phys. Rev. E 91, 043105 (2015). [2] S. Rosmej, subm. to Contrib. Plasma Phys.