Many-body basis-set reduction applied to the two-dimensional t-Jz model.

  title={Many-body basis-set reduction applied to the two-dimensional t-Jz model.},
  author={Riera and Dagotto},
  journal={Physical review. B, Condensed matter},
  volume={47 22},
  • Riera, Dagotto
  • Published 7 December 1992
  • Physics, Medicine
  • Physical review. B, Condensed matter
A simple variation of the Lanczos method is discussed. The technique is based on a systematic reduction of the size of the Hilbert space of the model under consideration, and it has many similarities with the basis-set-reduction approach recently introduced by Wenzel and Wilson in the context of quantum chemistry. As an example, the two-dimensional [ital t]-[ital J][sub [ital z]] model of strongly correlated electrons is studied. Accurate results for the ground-state energy can be obtained on… 
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