Many-body approach to superfluid nuclei in axial geometry

Znanstveni rad - Izvorni znanstveni rad

• Autor: Yinu Zhang
• Autor: Antonio Bjelčić
• Autor: Tamara Nikšić
• Autor: Elena Litvinova
• Autor: Peter Ring
• Autor: Peter Schuck
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Starting from a general many-body fermionic Hamiltonian, we derive the equations of motion (EOM) for nucleonic propagators in a superfluid system. The resulting EOM is of the Dyson type formulated in the basis of Bogoliubov's quasiparticles. As the leading contributions to the dynamical kernel of this EOM in strongly- coupled regimes contain phonon degrees of freedom in various channels, an efficient method of calculating phonon's characteristics is required to successfully model these kernels. The traditional quasiparticle random phase approximation (QRPA) solvers are typically used for this purpose in nuclear structure calculations, however, they become very prohibitive in nonspherical geometries. In this paper, by linking the notion of the quasiparticle- phonon vertex to the variation of the Bogoliubov's Hamiltonian, we show that the recently developed finite-amplitude method (FAM) can be efficiently employed to compute the vertices within the FAM- QRPA. To illustrate the validity of the method, calculations based on the relativistic density- dependent point-coupling Lagrangian are performed for the single-nucleon states in heavy and medium- mass nuclei with axial deformations. The cases of 38Si and 250Cf are presented and discussed.

• Ključne riječi (engleski): superfluid nuclei; axial geometry
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review C
• Brojčani podaci: vol. 105, br. 4, 044326
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.105.044326
• URN:NBN: urn:nbn:hr:217:984525
• Datum objave publikacije: 2022
• Projekt: Šifra: KK.01.1.1.01.0004; Naziv (engleski): QuantiXLie Center of Excellence; Kratica: QuantiXLie; Voditelj: Hrvoje Buljan, Pavle Pandžić; Pravna nadležnost: eu; Financijer: Croatian Government and European Union; Linija financiranja: European Regional Development Fund - the Competitiveness and Cohesion Operational Programme
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevC.105.044326
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2022 American Physical Society. Received 12 May 2021; Accepted 18 February 2022; Published 27 April 2022.
• Datum i vrijeme pohrane: 2023-09-13 19:21:20