Bochum 2015 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 10: Theory and Modelling I

P 10.10: Vortrag

Dienstag, 3. März 2015, 13:00–13:15, HZO 50

Ab initio thermodynamic results for the degenerate electron gas at finite temperature — Tim Schoof, Simon Groth, Jan Vorberger, and •Michael Bonitz — ITAP, Christian-Albrechts-Universität Kiel Leibnizstr. 15, 24098 Kiel, Germany

The uniform electron gas (UEG) at finite temperature is of key relevance for many applications in dense plasmas, warm dense matter and laser excited solids. Recently, first principle restricted path integral Monte Carlo results became available [1] which, however, due to the Fermion sign problem (FSP), are confined to moderate degeneracy, i.e. low to moderate densities with r_s=r/a_B 1 [r is the mean interparticle distance and a_B the Bohr radius]. Here we present novel first principle configuration PIMC [2,3] results for polarized electrons, for r_s 1 that close this gap and indicate that the previous data of Ref. [1] are inaccurate [4]. We also present quantum statistical data within the e⁴-approximation which agree very well with our CPIMC results at high densities.
Supported by the Deutsche Forschungsgemeinschaft vie project BO1366-10

[1] E. Brown et al., Phys. Rev. Lett. 110, 146405 (2013). [2] T. Schoof et al., Contrib. Plasma Phys. 51, 687 (2011). [3] T. Schoof, S. Groth, and M. Bonitz, Contrib. Plasma Phys. (2015), DOI: 10.1002/ctpp.201400072. [4] T. Schoof et al., submitted to Phys. Rev. Lett.