Jena 2013 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 19: Poster: Theorie und Modellierung

P 19.7: Poster

Donnerstag, 28. Februar 2013, 14:00–16:00, Poster EG

Screened potential of a proton in a dense hydrogen plasma: comparing DFT and quantum hydrodynamics — •Michael Bonitz, Eckhard Pehlke, and Tim Schoof — Institut für Theoretische Physik und Astrophysik, CAU Kiel, Leibnizstr. 15

The phase diagram of dense hydrogen is of vital interest for astrophysical objects, such as stars and planets, and laboratory applications, including warm dense matter, laser plasmas and inertial confinement fusion. At high densities neutral hydrogen is known to pressure ionize into an electron-proton plasma. At sufficiently high densities and low temperatures protons may form a crystal [1], for more details on the phase diagram, see Ref. [2]. In a recent letter [3] Shukla and Eliasson claimed the existence of new type of proton crystal based on a ``novel attractive potential'' of protons in a dense quantum plasma. We test these predictions by performing ab initio density functional calculations [4] and put them in context with previous results.

[1] M. Bonitz, V.S. Filinov, V.E. Fortov. P.R. Levashov, and H. Fehske, Phys. Rev. Lett. 95, 235006 (2005)

[2] J.M. Mc Mahon, M.A. Morales, C. Pierleoni, and D.M. Cerperley, Rev. Mod. Phys. 84, 1607 (2012)

[3] P.K. Shukla and B. Eliasson, Phys. Rev. Lett. 108, 165007 (2012)

[4] M. Bonitz, E. Pehlke, T. Schoof, Phys. Rev. E, accepted (2013), arxiv: 1205.4922