Abstract
We present a variational Monte Carlo calculation of a small 3He cluster within the Jastrow-Feenberg-Slater wave function approach. The trial wave function incorporates, in a progressive way, higher order correlations to elucidate at a quantitative level the relevance and possible interference of the different correlation mechanisms. As proved previously in bulk, the present results show the importance of backflow correlations to achieve a realistic description of this Fermi system. On the other hand, the introduction of three-body dynamical correlations also improves the ground-state energy, reducing appreciably the difference between this variational approach and more exact results obtained using the diffusion Monte Carlo method.
Published Version
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