Ground State Phase Diagram of the Extended Hubbard Model with Pair-Hopping Interaction in the Limit of Very Narrow Bandwidth

@article{Kapcia2016GroundSP,
  title={Ground State Phase Diagram of the Extended Hubbard Model with Pair-Hopping Interaction in the Limit of Very Narrow Bandwidth},
  author={Konrad Jerzy Kapcia and W. R. Czart},
  journal={Acta Physica Polonica A},
  year={2016},
  volume={130},
  pages={617-620}
}
The extended Hubbard model with the pair-hopping interaction, i.e. the Penson–Kolb–Hubbard model, is one of the conceptually simplest phenomenological models for studying correlations and for description of superconductivity in very narrow-band systems with short-range, almost unretarded pairing. We present ground state phase diagrams of the model derived within the broken-symmetry Hartree–Fock approximation in the narrow-bandwidth regime and compare these results with the exact ones in the… 

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