Erlangen 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
P: Fachverband Plasmaphysik
P 18: High Energy Density Physics III
P 18.4: Vortrag
Donnerstag, 19. März 2026, 17:15–17:30, KH 01.020
Matsubara Local Field Correction of Warm Dense Beryllium — •Maximilian Boehme1, Tobias Dornheim2, Jan Vorberger2, and Zhandos Moldabekov2 — 1Lawrence Livermore National Laboratory — 2Helmholtz-Zentrum Dresden-Rossendorf
Recent studies, including Dornheim et al. [EPL 147, 36001 (2024)], have highlighted the role of dynamical quantum effects encoded in the imaginary-time correlation function of the uniform electron gas in the warm dense matter (WDM) regime. In this work, we extend these efforts by employing the Fourier-Matsubara expansion framework introduced by Tolias et al. [J. Chem. Phys. 160, 181102 (2024)] to compute the Matsubara density-response function of warm dense beryllium using path-integral Monte Carlo simulations. We consider temperatures from 155.5 to 190 eV and densities between 7.5 and 30 g/cc, spanning a representative region of the WDM phase space. This approach provides access to electronic correlations and localization phenomena within the imaginary-time formalism. Furthermore, the resulting Matsubara density-response enables the extraction of the corresponding local field correction (LFC), thereby revealing the imaginary-frequency dependence of exchange-correlation effects in beryllium. Our results offer new insight into the microscopic dynamical behaviour of partially ionized systems and support the development of improved theoretical models for WDM.
Keywords: Warm Dense Matter; Path-Integral Monte Carlo; Plasma Physics; Computational Physics