From the lightest nuclei to the equation of state of asymmetric nuclear matter with realistic nuclear interactions

Abstract

We present microscopic calculations of light and medium mass nuclei and the equation of state of symmetric and asymmetric nuclear matter using different nucleon-nucleon forces, including a new Argonne version that has the same spin/isospin structure as local chiral forces at next-to-next-to-leading order (N2LO). The calculations are performed using Auxiliary Field Diffusion Monte Carlo (AFDMC) combined with an improved variational wave function. We show that the AFDMC method can now be used to successfully calculate the energies of very light to medium mass nuclei as well as the energy of isospin-asymmetric nuclear matter, demonstrating microscopically the quadratic dependence of the energy on the symmetry energy.

6 pages, 2 figures

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• Neutron stars and the dense matter equation of state: from microscopic theory to macroscopic observations
• Two- and three-nucleon contact interactions and ground-state energies of light- and medium-mass nuclei
• Path integral contour deformations for noisy observables
• Prior probability distributions of neutron star crust models
• Diagrammatic ab initio methods for infinite nuclear matter with modern chiral interactions
• Successive variational approach with the tensor-optimized antisymmetrized molecular dynamics for the ${}^5$He nucleus
• Perturbative treatment of nonlocal chiral interactions in auxiliary-field diffusion Monte Carlo calculations
• Ab initio study of the neutron and Fermi polarons on the lattice