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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
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Bogoliubov many-body perturbation theory for open-shell nuclei
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2018
Publisher: Elsevier
Journal or Publication Title: Physics Letters B
Volume of the journal: 786
DOI: 10.26083/tuprints-00012722
Corresponding Links:
Origin: Secondary publication

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: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-127229
Additional Information:

Keywords: Perturbation theory; Many-body theory; Ab initio; Open-shell nuclei

Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 25 Mar 2022 13:13
Last Modified: 22 Feb 2023 07:30
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/12722
PPN: 505196123
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