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texttt{NuHamil}: A numerical code to generate nuclear two- and three-body matrix elements from chiral effective field theory
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texttt{NuHamil}: A numerical code to generate nuclear two- and three-body matrix elements from chiral effective field theory
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The applicability of nuclear {\it ab initio} calculations has rapidly extended over the past decades. However, starting research projects is still challenging due to the required numerical expertise in the generation of underlying nuclear interaction matrix elements and many-body calculations. To ease the first issue, in this paper we introduce the numerical code \texttt{NuHamil} to generate the nucleon-nucleon (NN) and three-nucleon (3N) matrix elements expressed in a spherical harmonic-oscillator basis, inputs of many-body calculations. The ground-state energies for the selected doubly closed shell nuclei are calculated with the no-core shell-model (NCSM) and in-medium similarity renormalization group (IMSRG). The code is written in modern Fortran, and OpenMP+MPI hybrid parallelization is available for the 3N matrix-element calculations.
Forward citations
Cited by 3 Pith papers
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Ab initio calculations of parity-violating electron scattering off $^{48}$Ca and $^{208}$Pb
Ab initio chiral EFT calculations of parity-violating asymmetries for 48Ca and 208Pb show mild tension with data and infer a neutron skin of 0.187(25)(18) fm for 208Pb.
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Taming nuclear size and shape effects in superallowed beta-decay
A combined ab initio and experimental analysis of nuclear form factors reduces uncertainties in superallowed beta-decay rates, enabling a more precise first-row CKM unitarity test.
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Jacobi Coordinates on Hyper-tori and Geometric Factors in the Volume Dependencies
The finite-volume energy shift of a clustered nucleus is the point-like two-body shift multiplied by a geometric factor that counts spin-isospin cluster partitions, and this factor is essential for extracting ANCs.
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