TY - JOUR
T1 - Auxiliary field diffusion Monte Carlo calculation of ground state properties of neutron drops
AU - Pederiva, F.
AU - Sarsa, A.
AU - Schmidt, Kevin
AU - Fantoni, S.
N1 - Funding Information:
S.F. wish to thank the International Centre for Theoretical Physics in Trieste for partial support. A.S. acknowledges the Spanish Ministerio de Ciencia y Tecnologia for partial support under contract BMF2002-00200. Calculations have been performed in part on the ALPS cluster at ECT* in Trento.
PY - 2004/9/20
Y1 - 2004/9/20
N2 - The auxiliary field diffusion Monte Carlo method has been applied to simulate droplets of 7 and 8 neutrons. Results for realistic nucleon-nucleon interactions, which include tensor, spin-orbit and three-body forces, plus a standard one-body confining potential, have been compared with analogous calculations obtained with Green's function Monte Carlo methods. We have studied the dependence of the binding energy, the one-body density and the spin-orbit splittings of 7n on the depth of the confining potential. The results obtained show an overall agreement between the two quantum Monte Carlo methods, although there persist differences in the evaluation of spin-orbit forces, as previously indicated by bulk neutron matter calculations. Energy density functional models, largely used in astrophysical applications, seem to provide results significantly different from those of quantum simulations. Given its scaling behavior in the number of nucleons, the auxiliary field diffusion Monte Carlo method seems to be one of the best candidate to perform ab initio calculations on neutron rich nuclei.
AB - The auxiliary field diffusion Monte Carlo method has been applied to simulate droplets of 7 and 8 neutrons. Results for realistic nucleon-nucleon interactions, which include tensor, spin-orbit and three-body forces, plus a standard one-body confining potential, have been compared with analogous calculations obtained with Green's function Monte Carlo methods. We have studied the dependence of the binding energy, the one-body density and the spin-orbit splittings of 7n on the depth of the confining potential. The results obtained show an overall agreement between the two quantum Monte Carlo methods, although there persist differences in the evaluation of spin-orbit forces, as previously indicated by bulk neutron matter calculations. Energy density functional models, largely used in astrophysical applications, seem to provide results significantly different from those of quantum simulations. Given its scaling behavior in the number of nucleons, the auxiliary field diffusion Monte Carlo method seems to be one of the best candidate to perform ab initio calculations on neutron rich nuclei.
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U2 - 10.1016/j.nuclphysa.2004.06.030
DO - 10.1016/j.nuclphysa.2004.06.030
M3 - Article
AN - SCOPUS:4344600898
SN - 0375-9474
VL - 742
SP - 255
EP - 268
JO - Nuclear Physics A
JF - Nuclear Physics A
IS - 1-2
ER -