Maris, Pieter ; Aktulga, Metin ; Binder, Sven ; Calci, Angelo ; Çatalyürek, Ümit ; Langhammer, Joachim ; Ng, Esmond ; Saule, Erik ; Roth, Robert ; Vary, James P. ; Yang, Chao (2013)
No Core CI calculations for light nuclei with chiral 2- and 3-body forces.
In: Journal of Physics: Conference Series, 454
doi: 10.1088/1742-6596/454/1/012063
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The atomic nucleus is a self-bound system of strongly interacting nucleons. In No-Core Configuration Interaction calculations, the nuclear wavefunction is expanded in Slater determinants of single-nucleon wavefunctions (Configurations), and the many-body Schrödinger equation becomes a large sparse matrix problem. The challenge is to reach numerical convergence to within quantified numerical uncertainties for physical observables using finite truncations of the infinite-dimensional basis space. We discuss strategies for constructing and solving the resulting large sparse matrices for a set of low-lying eigenvalues and eigenvectors on current multicore computer architectures. Several of these strategies have been implemented in the code MFDn, a hybrid MPI/OpenMP Fortran code for ab initio nuclear structure calculations that scales well to over 200,000 cores. We discuss how the similarity renormalization group can be used to improve the numerical convergence. We present results for excitation energies and other selected observables for 8Be and 12C using realistic 2- and 3-body forces obtained from chiral perturbation theory. Finally, we demonstrate that collective phenomena such as rotational band structures can emerge from these microscopic calculations.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Maris, Pieter ; Aktulga, Metin ; Binder, Sven ; Calci, Angelo ; Çatalyürek, Ümit ; Langhammer, Joachim ; Ng, Esmond ; Saule, Erik ; Roth, Robert ; Vary, James P. ; Yang, Chao |
| Art des Eintrags: | Bibliographie |
| Titel: | No Core CI calculations for light nuclei with chiral 2- and 3-body forces |
| Sprache: | Englisch |
| Publikationsjahr: | 12 August 2013 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Conference Series |
| Jahrgang/Volume einer Zeitschrift: | 454 |
| DOI: | 10.1088/1742-6596/454/1/012063 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | The atomic nucleus is a self-bound system of strongly interacting nucleons. In No-Core Configuration Interaction calculations, the nuclear wavefunction is expanded in Slater determinants of single-nucleon wavefunctions (Configurations), and the many-body Schrödinger equation becomes a large sparse matrix problem. The challenge is to reach numerical convergence to within quantified numerical uncertainties for physical observables using finite truncations of the infinite-dimensional basis space. We discuss strategies for constructing and solving the resulting large sparse matrices for a set of low-lying eigenvalues and eigenvectors on current multicore computer architectures. Several of these strategies have been implemented in the code MFDn, a hybrid MPI/OpenMP Fortran code for ab initio nuclear structure calculations that scales well to over 200,000 cores. We discuss how the similarity renormalization group can be used to improve the numerical convergence. We present results for excitation energies and other selected observables for 8Be and 12C using realistic 2- and 3-body forces obtained from chiral perturbation theory. Finally, we demonstrate that collective phenomena such as rotational band structures can emerge from these microscopic calculations. |
| Zusätzliche Informationen: | Art.No.: 012063 |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 634: Kernstruktur, nukleare Astrophysik und fundamentale Experimente bei kleinen Impulsüberträgen am supraleitenden Darmstädter Elektronenbeschleuniger S-DALINAC DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 634: Kernstruktur, nukleare Astrophysik und fundamentale Experimente bei kleinen Impulsüberträgen am supraleitenden Darmstädter Elektronenbeschleuniger S-DALINAC > D: Theoretische Kernstrukturphysik DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 634: Kernstruktur, nukleare Astrophysik und fundamentale Experimente bei kleinen Impulsüberträgen am supraleitenden Darmstädter Elektronenbeschleuniger S-DALINAC > D: Theoretische Kernstrukturphysik > D1: Theoretische Kernstrukturphysik |
| Hinterlegungsdatum: | 13 Feb 2014 11:55 |
| Letzte Änderung: | 16 Feb 2024 11:57 |
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Verfügbare Versionen dieses Eintrags
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No Core CI calculations for light nuclei with chiral 2- and 3-body forces. (deposited 21 Nov 2023 10:39)
- No Core CI calculations for light nuclei with chiral 2- and 3-body forces. (deposited 13 Feb 2014 11:55) [Gegenwärtig angezeigt]
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