Auxiliary field diffusion Monte Carlo calculations of light and medium-mass nuclei with local chiral interactions

Abstract

Quantum Monte Carlo methods have recently been employed to study properties of nuclei and infinite matter using local chiral effective field theory interactions. In this work, we present a detailed description of the auxiliary field diffusion Monte Carlo algorithm for nuclei in combination with local chiral two- and three-nucleon interactions up to next-to-next-to-leading order. We show results for the binding energy, charge radius, charge form factor, and Coulomb sum rule in nuclei with $3\le A\le 16$. Particular attention is devoted to the effect of different operator structures in the three-body force for different cutoffs. The outcomes suggest that local chiral interactions fit to few-body observables give a very good description of the ground-state properties of nuclei up to ${}^{16}$O, with the exception of one fit for the softer cutoff which predicts overbinding in larger nuclei.

arXiv comment23 pages, 10 figures

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