Density Matrix Embedding from Broken Symmetry Lattice Mean-Fields

@article{Bulik2014DensityME,
  title={Density Matrix Embedding from Broken Symmetry Lattice Mean-Fields},
  author={Ireneusz W. Bulik and Gustavo E. Scuseria and Jorge Dukelsky},
  journal={Physical Review B},
  year={2014},
  volume={89},
  pages={035140}
}
lattice mean-field allows precise control of the lattice and fragment filling while providing very good agreement between predicted properties and exact results. We present a rigorous proof that at convergence this method is guaranteed to preserve lattice and fragment filling. Differences arising from fitting the fragment one-particle density matrix alone versus fitting fragment plus bath are scrutinized. We argue that it is important to restrict the density matrix fitting to solely the… 

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