Effective Hamiltonians and Phase Diagrams for Tight-Binding Models

@inproceedings{Datta2008EffectiveHA,
  title={Effective Hamiltonians and Phase Diagrams for Tight-Binding Models},
  author={Nilanjana Datta},
  year={2008}
}
We present rigorous results for several variants of the Hubbard model in the strongcoupling regime. We establish a mathematically controlled perturbation expansion which shows how previously proposed effective interactions are, in fact, leading-order Researcher of the National Research Council (CONICET), Argentina Work partially supported by CNPq (grant 301625/95-6), FAPESP 95/0790-1 (Projeto Temático “Fenômenos cŕıticos e processos evolutivos e sistemas em equiĺıbrio”) and FINEP (Núcleo de… CONTINUE READING