Numerical minimisation of Gutzwiller energy functionals
  We give a comprehensive introduction into an efficient numerical scheme for the minimisation of Gutzwiller energy functionals in studies on multi-band Hubbard models. Our method covers all conceivable cases of Gutzwiller variational wave functions and has been used successfully in previous numerical studies. 
J\"org B\"unemann, Florian Gebhard, Tobias Schickling, Werner Weber
cond-mat.str-el