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

Abstract

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.

7 pages, 4 figures, version published at Phys. Lett. B

References in corpus (22)

• The density-matrix renormalization group in the age of matrix product states
• Chiral effective field theory and nuclear forces
• Improved nuclear matter calculations from chiral low-momentum interactions
• The density matrix renormalization group for ab initio quantum chemistry
• A nucleus-dependent valence-space approach to nuclear structure
• A Guided Tour of Ab Initio Nuclear Many-Body Theory
• In-Medium Similarity Renormalization Group for Nuclei
• In-Medium Similarity Renormalization Group with Chiral Two- Plus Three-Nucleon Interactions
• ${}^{78}$Ni revealed as a doubly magic stronghold against nuclear deformation
• In-Medium Similarity Renormalization Group for Open-Shell Nuclei
• Converged ab initio calculations of heavy nuclei
• Charge radii of exotic neon and magnesium isotopes
• Three-nucleon forces and spectroscopy of neutron-rich calcium isotopes
• Angular-momentum projection in coupled-cluster theory: structure of ${}^{34}$Mg
• In-medium similarity renormalization group with three-body operators
• Multi-reference many-body perturbation theory for nuclei III -- Ab initio calculations at second order in PGCM-PT
• \texttt{NuHamil}: A numerical code to generate nuclear two- and three-body matrix elements from chiral effective field theory
• Combining the in-medium similarity renormalization group with the density matrix renormalization group: Shell structure and information entropy
• Quantum entanglement patterns in the structure of atomic nuclei within the nuclear shell model
• Normal ordering of three-nucleon interactions for ab initio calculations of heavy nuclei
• Towards heavy-mass ab initio nuclear structure: Open-shell Ca, Ni and Sn isotopes from Bogoliubov coupled-cluster theory
• Towards large-scale restricted active space calculations inspired by the Schmidt decomposition

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• Ab initio computations from ${}^{78}$Ni towards ${}^{70}$Ca along neutron number $N=50$
• Ab initio calculations of anomalous seniority breaking in the $\pi g_{9/2}$ shell for the $N=50$ isotones
• A Quantum Annealing Protocol to Solve the Nuclear Shell Model
• Randomized Low-Rank Decompositions of Nuclear Three-Body Interactions
• Partial conservation of seniority in semi-magic nuclei
• Evolution of shell structure at $\mathbf{N}=32$ and 34: Insights from realistic nuclear forces
• From closed shells to open shells: Coupled-cluster calculations of atomic nuclei
• Ab initio study in the island of inversion within the two-major-shell valence space
• Ab initio calculations of nuclear charge radii across and beyond ${}^{132}$Sn: Putting chiral EFT nuclear interactions to the test