Greifswald 2009 – scientific programme
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P: Fachverband Plasmaphysik
P 18: Poster: Theorie/Modellierung
P 18.3: Poster
Wednesday, April 1, 2009, 17:30–19:30, Foyer des IfP
Quantum Potentials with Degeneracy — Sandipan Dutta1, James Dufty1, Alexei Filinov2, and •Michael Bonitz2 — 1Department of Physics, University of Florida, Gainesville, FL 32611 — 2Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universitat zu Kiel, D-24098 Kiel
An effective quantum potential can be defined by requiring that the ideal inhomogeneous electron gas have its simple classical form. Such quantum potentials are very useful for embedding essential quantum effects in semi-classical descriptions such as MD simulations and for implementation of PIMC and DFT calculations. If exchange effects are neglected the weak coupling form for the external potential is the familiar Kelbg result. Recently [1], it has been shown how to improve that result to include strong coupling. Here, those results are extended to include the effects of electron degeneracy. It is found that the weak coupling form with exchange is well-represented by the Kelbg result modified by a suitable coordinate scaling. This allows a phenomenological extension to include both degeneracy and strong coupling.
[1] A. Filinov, V. Golubnychiy, M. Bonitz, W. Ebeling, and J.W. Dufty, Phys. Rev. E 70, 046411 (2004).