Tichai, Alexander ; Arthuis, Pierre ; Duguet, Thomas ; Hergert, Heiko ; Somà, Vittorio ; Roth, Robert (2018)
Bogoliubov many-body perturbation theory for open-shell nuclei.
In: Physics Letters B, 786
doi: 10.1016/j.physletb.2018.09.044
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
A Rayleigh–Schrödinger many-body perturbation theory (MBPT) approach is introduced by making use of a particle-number-breaking Bogoliubov reference state to tackle (near-)degenerate open-shell fermionic systems. By choosing a reference state that solves the Hartree–Fock–Bogoliubov variational problem, the approach reduces to the well-tested Møller–Plesset, i.e., Hartree–Fock based, MBPT when applied to closed-shell systems. Due to its algorithmic simplicity, the newly developed framework provides a computationally simple yet accurate alternative to state-of-the-art non-perturbative manybody approaches. At the price of working in the quasi-particle basis associated with a single-particle basis of sufficient size, the computational scaling of the method is independent of the particle number. This paper presents the first realistic applications of the method ranging from the oxygen to the nickel isotopic chains on the basis of a modern nuclear Hamiltonian derived from chiral effective field theory.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Tichai, Alexander ; Arthuis, Pierre ; Duguet, Thomas ; Hergert, Heiko ; Somà, Vittorio ; Roth, Robert |
| Art des Eintrags: | Bibliographie |
| Titel: | Bogoliubov many-body perturbation theory for open-shell nuclei |
| Sprache: | Englisch |
| Publikationsjahr: | 2018 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physics Letters B |
| Jahrgang/Volume einer Zeitschrift: | 786 |
| DOI: | 10.1016/j.physletb.2018.09.044 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | A Rayleigh–Schrödinger many-body perturbation theory (MBPT) approach is introduced by making use of a particle-number-breaking Bogoliubov reference state to tackle (near-)degenerate open-shell fermionic systems. By choosing a reference state that solves the Hartree–Fock–Bogoliubov variational problem, the approach reduces to the well-tested Møller–Plesset, i.e., Hartree–Fock based, MBPT when applied to closed-shell systems. Due to its algorithmic simplicity, the newly developed framework provides a computationally simple yet accurate alternative to state-of-the-art non-perturbative manybody approaches. At the price of working in the quasi-particle basis associated with a single-particle basis of sufficient size, the computational scaling of the method is independent of the particle number. This paper presents the first realistic applications of the method ranging from the oxygen to the nickel isotopic chains on the basis of a modern nuclear Hamiltonian derived from chiral effective field theory. |
| Zusätzliche Informationen: | Keywords: Perturbation theory; Many-body theory; Ab initio; Open-shell nuclei |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik |
| Hinterlegungsdatum: | 02 Aug 2024 12:39 |
| Letzte Änderung: | 02 Aug 2024 12:39 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Bogoliubov many-body perturbation theory for open-shell nuclei. (deposited 25 Mär 2022 13:13)
- Bogoliubov many-body perturbation theory for open-shell nuclei. (deposited 02 Aug 2024 12:39) [Gegenwärtig angezeigt]
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