Exact series expansion for even frequency moments of the dynamic structure factor
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911001903890432 |
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| author | Tolias, Panagiotis Vorberger, Jan Dornheim, Tobias |
| author_facet | Tolias, Panagiotis Vorberger, Jan Dornheim, Tobias |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_10410 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exact series expansion for even frequency moments of the dynamic structure factor Tolias, Panagiotis Vorberger, Jan Dornheim, Tobias Plasma Physics Chemical Physics 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. |
| title | Exact series expansion for even frequency moments of the dynamic structure factor |
| topic | Plasma Physics Chemical Physics |
| url | https://arxiv.org/abs/2506.10410 |