Tichai, Alexander ; Langhammer, Joachim ; Binder, Sven ; Roth, Robert (2016)
Hartree-Fock many-body perturbation theory for nuclear ground-states.
In: Physics Letters B, 756
doi: 10.1016/j.physletb.2016.03.029
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
We investigate the order-by-order convergence behavior of many-body perturbation theory (MBPT) as a simple and efficient tool to approximate the ground-state energy of closed-shell nuclei. To address the convergence properties directly, we explore perturbative corrections up to 30th order and highlight the role of the partitioning for convergence. The use of a simple Hartree–Fock solution for the unperturbed basis leads to a convergent MBPT series for soft interactions, in contrast to the divergent MBPT series obtained with a harmonic oscillator basis. For larger model spaces and heavier nuclei, where a direct high-order MBPT calculation is not feasible, we perform third-order calculations and compare to advanced ab initio coupled-cluster results for the same interactions and model spaces. We demonstrate that third-order MBPT provides ground-state energies for nuclei up into the tin isotopic chain in excellent agreement with the best available coupled-cluster calculations at a fraction of the computational cost.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Tichai, Alexander ; Langhammer, Joachim ; Binder, Sven ; Roth, Robert |
| Art des Eintrags: | Bibliographie |
| Titel: | Hartree-Fock many-body perturbation theory for nuclear ground-states |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physics Letters B |
| Jahrgang/Volume einer Zeitschrift: | 756 |
| DOI: | 10.1016/j.physletb.2016.03.029 |
| URL / URN: | http://www.sciencedirect.com/science/article/pii/S0370269316... |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | We investigate the order-by-order convergence behavior of many-body perturbation theory (MBPT) as a simple and efficient tool to approximate the ground-state energy of closed-shell nuclei. To address the convergence properties directly, we explore perturbative corrections up to 30th order and highlight the role of the partitioning for convergence. The use of a simple Hartree–Fock solution for the unperturbed basis leads to a convergent MBPT series for soft interactions, in contrast to the divergent MBPT series obtained with a harmonic oscillator basis. For larger model spaces and heavier nuclei, where a direct high-order MBPT calculation is not feasible, we perform third-order calculations and compare to advanced ab initio coupled-cluster results for the same interactions and model spaces. We demonstrate that third-order MBPT provides ground-state energies for nuclei up into the tin isotopic chain in excellent agreement with the best available coupled-cluster calculations at a fraction of the computational cost. |
| Zusätzliche Informationen: | Erstveröffentlichung |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik > Kern- und Vielteilchenphysik |
| Hinterlegungsdatum: | 18 Apr 2017 08:16 |
| Letzte Änderung: | 26 Jul 2024 10:42 |
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Verfügbare Versionen dieses Eintrags
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Hartree-Fock many-body perturbation theory for nuclear ground-states. (deposited 10 Mär 2022 13:13)
- Hartree-Fock many-body perturbation theory for nuclear ground-states. (deposited 18 Apr 2017 08:16) [Gegenwärtig angezeigt]
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