Notes on the Cluster Gutzwiller Method: Inhomogeneous Lattices,   Excitations, and Cluster Time Evolution
  Several perspectives of the cluster Gutzwiller method are briefly discussed. I show that the cluster mean-field method can be used for large inhomogeneous lattices, for computing local excitations, and for the time evolution of correlated quantum systems. 
Dirk-S\"oren L\"uhmann
cond-mat.quant-gas