Spectroscopy of N = 50 isotones with the valence-space density matrix renormalization group

A. Tichai; K. Kapás; T. Miyagi; M.A. Werner; Ö. Legeza; A. Schwenk; G. Zarand

Physics Letters B (Aug 2024)

Spectroscopy of N = 50 isotones with the valence-space density matrix renormalization group

A. Tichai,
K. Kapás,
T. Miyagi,
M.A. Werner,
Ö. Legeza,
A. Schwenk,
G. Zarand

Affiliations

A. Tichai: Technische Universität Darmstadt, Department of Physics, 64289 Darmstadt, Germany; ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany; Corresponding author.
K. Kapás: Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary; Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
T. Miyagi: Technische Universität Darmstadt, Department of Physics, 64289 Darmstadt, Germany; ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany; Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
M.A. Werner: HUN-REN-BME Quantum Dynamics and Correlations Research Group, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary; Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary; Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary
Ö. Legeza: Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary; Institute for Advanced Study, Technical University of Munich, Lichtenbergstrasse 2a, 85748 Garching, Germany
A. Schwenk: Technische Universität Darmstadt, Department of Physics, 64289 Darmstadt, Germany; ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
G. Zarand: Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary; HUN-REN-BME Quantum Dynamics and Correlations Research Group, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary

Journal volume & issue: Vol. 855
p. 138841

Abstract

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The recently proposed combination of the valence-space in-medium similarity renormalization group (VS-IMSRG) with the density matrix renormalization group (DMRG) offers a scalable and flexible many-body approach for strongly correlated open-shell nuclei. We use the VS-DMRG to investigate the low-lying spectroscopy of N=50 isotones, which are characteristic for their transition between single-particle and collective excitations. We also study electromagnetic transitions and show the advantage of the VS-DMRG to capture the underlying physics more efficiently, with significantly improved convergence compared to state-of-the-art shell-model truncations. Combined with an analysis of quantum information measures, this further establishes the VS-DMRG as a valuable method for ab initio calculations of nuclei.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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