Monte Carlo energy and variance minimization techniques for optimizing many-body wave functions

  title={Monte Carlo energy and variance minimization techniques for optimizing many-body wave functions},
  author={P.R.C.Kent and R.J.Needs and G.Rajagopal},
We investigate Monte Carlo energy and variance minimization techniques for optimizing many–body wave functions. Several variants of the basic techniques are studied, including limiting the variations in the weighting factors which arise in correlated sampling estimations of the energy and its variance. We investigate the numerical stability of the techniques and identify two reasons why variance minimization exhibits superior numerical stability to energy minimization. The characteristics of… 
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