Symmetry-projected variational calculations with the numerical suite TAURUS
| Autor: | Tomás R. Rodríguez, Adrián Sánchez-Fernández, B. Bally |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Nuclear and High Energy Physics Angular momentum Nuclear Theory Field (physics) 010308 nuclear & particles physics FOS: Physical sciences Spherical harmonics Parity (physics) 01 natural sciences Nuclear Theory (nucl-th) Theoretical physics Projection (relational algebra) Isospin 0103 physical sciences Invariant (mathematics) 010306 general physics Multipole expansion |
| Zdroj: | The European Physical Journal A. 57 |
| ISSN: | 1434-601X 1434-6001 |
| DOI: | 10.1140/epja/s10050-021-00369-z |
| Popis: | We present the numerical code TAURUS_vap that solves the variation after particle-number projection equations for symmetry-unrestricted real Bogoliubov quasiparticle states represented in a spherical harmonic oscillator basis. The model space considered is invariant under spatial and isospin rotations but no specific set of orbits is assumed such that the code can carry out both valence-space and no-core calculations. In addition, no number parity is assumed for the Bogoliubov quasiparticle states such that the code can be used to describe even-even, odd-even and odd-odd nuclei. The variational procedure can be performed under several simultaneous constraints on the expectation values of a variety of operators such as the multipole deformations, the pairing field or the components of the angular momentum. To demonstrate the potential and versatility of the code, we perform several example calculations using an empirical shell-model interaction as well as a chiral interaction. The ability to perform advanced variational Bogoliubov calculations offered by this code will, we hope, be beneficial to the shell model and ab initio communities. 22 pages, 3 figures Accepted version (with some typo corrections) |
| Databáze: | OpenAIRE |
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