Some Auxiliary field diffusion Monte Carlo of nuclear systems 5 Titel

Kevin Schmidt

Arizona State University

The auxiliary field quantum Monte Carlo method introduces an integration over auxiliary fields to separate the spin and isospin interactions in the nuclear forces. Monte Carlo sampling of the auxiliary fields effectively samples the spin-isospin degrees of freedom allowing a Monte Carlo solution of the Schroedinger equation with spin-isospin potential subject to a fixed-node-like constraint to alleviate the fermion sign problem. The method is described. Results for some nuclei, neutron droplets, and the pairing gap in neutron matter will be shown.