Exact series expansion for even frequency moments of the dynamic structure factor
An exact series representation of the even frequency moments of the dynamic structure factor is derived. Truncations are proposed that allow to evaluate the explicitly unknown second, fourth, and fifth frequency moments for the finite temperature uniform electron gas. Their applicability range in terms of degeneracy parameter and wavenumber is determined by exploiting the non-interacting limit and by comparing with the quasi-exact results of path integral Monte Carlo simulations.
Authors
- Jan Vorberger (ORCID: https://orcid.org/0000-0001-5926-9192)
- Tobias Dornheim (ORCID: https://orcid.org/0000-0001-7293-6615)
- P. Tolias (ORCID: https://orcid.org/0000-0001-9632-8104)
Institutions
- Helmholtz-Zentrum Dresden-Rossendorf (DE)
- Center for Advanced Systems Understanding (DE)
- KTH Royal Institute of Technology (SE)
Publication Details
- Journal
- Physics of Plasmas
- Published
- 2025-08-01
- DOI
- https://doi.org/10.1063/5.0284989
- Citations
- 2
- Primary Topic
- Quantum, superfluid, helium dynamics
- Type
- article
- Field-Weighted Citation Impact
- 2.49
Funders
- European Commission
- Bundesministerium für Bildung und Forschung
- HORIZON EUROPE European Research Council