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arXiv · 1802.08932

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

D. Lonardoni·S. Gandolfi·J. E. Lynn·C. Petrie·J. Carlson·K. E. Schmidt·A. Schwenk
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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 $3\le A\le16$. 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.

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D. Lonardoni, S. Gandolfi, J. E. Lynn, C. Petrie, J. Carlson, K. E. Schmidt, A. Schwenk. 2018-02-25. Auxiliary field diffusion Monte Carlo calculations of light and medium-mass nuclei with local chiral interactions. https://doi.org/10.1103/physrevc.97.044318

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