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Bogoliubov many-body perturbation theory for open-shell nuclei

Tichai, Alexander ; Arthuis, Pierre ; Duguet, Thomas ; Hergert, Heiko ; Somà, Vittorio ; Roth, Robert (2022)
Bogoliubov many-body perturbation theory for open-shell nuclei.
In: Physics Letters B, 2018, 786
doi: 10.26083/tuprints-00012722
Artikel, Zweitveröffentlichung, Verlagsversion

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: 2022
Autor(en): Tichai, Alexander ; Arthuis, Pierre ; Duguet, Thomas ; Hergert, Heiko ; Somà, Vittorio ; Roth, Robert
Art des Eintrags: Zweitveröffentlichung
Titel: Bogoliubov many-body perturbation theory for open-shell nuclei
Sprache: Englisch
Publikationsjahr: 2022
Publikationsdatum der Erstveröffentlichung: 2018
Verlag: Elsevier
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Physics Letters B
Jahrgang/Volume einer Zeitschrift: 786
DOI: 10.26083/tuprints-00012722
URL / URN: https://tuprints.ulb.tu-darmstadt.de/12722
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Herkunft: Zweitveröffentlichung
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.

Status: Verlagsversion
URN: urn:nbn:de:tuda-tuprints-127229
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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: 25 Mär 2022 13:13
Letzte Änderung: 29 Mär 2022 08:57
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