NuLattice: Ab initio computations of atomic nuclei on lattices

Abstract

We introduce NuLattice, a Python software package for ab initio computations of atomic nuclei on lattices. The computational tools consist of Hartree Fock, the coupled cluster method, the in-medium similarity renormalization group, and full configuration interaction. At present, the employed interactions are from pion-less effective field theory at leading order and consist of two-body and three-body contacts. We present results for light nuclei ${}^2$H, ${}^{3,4}$He, ${}^8$Be, ${}^{12}$C, and ${}^{16}$O. NuLattice algorithms exploit the sparsity and locality of lattice interactions, and as a result computations can be run on laptops.

Comments: 15 pages, 5 figures, 5 tables, associated Python package available at https://github.com/NuLattice, published version