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P: Fachverband Plasmaphysik

P 14: Codes and modelling

P 14.3: Vortrag

Mittwoch, 11. März 2020, 14:40–14:55, b302

Ab initio simulation results for the dynamic properties of warm dense matter — •Michael Bonitz¹, Paul Hamann¹, Tobias Dornheim², and Alexey Filinov¹ — ¹Institut für Theoretische Physik und Astrophysik, Universität Kiel, Leibnizstr. 15 — ²Center for Advanced Systems Understanding (CASUS), Görlitz, Germany

Warm dense matter (WDM) – an exotic state where electrons are quantum degenerate and ions may be strongly correlated – is ubiquitous in astrophysics and highly compressed laboratory plasmas. We have recently obtained ab initio thermodynamic results for the electron component in WDM based on novel quantum Monte Carlo (QMC) simulations [1, 2] including the first ab initio parametrization of the exchange-correlation free energy F_xc [2, 3]. Moreover, recently the first exact QMC results for the dynamic local field correction and the dynamic structure factor could be obtained [4]. An interesting result is the prediction of a negative plasmon dispersion – an effect that should be observable in dense hydrogen.
[1] T. Dornheim, S. Groth, T. Sjostrom, F.D. Malone, W.M.C. Foulkes, and M. Bonitz, Phys. Rev. Lett. 117, 156403 (2016)

[2] S. Groth, T. Dornheim, T. Sjostrom, F.D. Malone, W.M.C. Foulkes, and M. Bonitz, Phys. Rev. Lett. 119, 135001 (2017)

[3] T. Dornheim, S. Groth, and M. Bonitz, Phys. Reports 744, 1-86 (2018)

[4] T. Dornheim, S. Groth, J. Vorberger, and M. Bonitz, Phys. Rev. Lett. 121, 255001 (2018)