Quantum-number projection in the path-integral renormalization group method

Takahiro Mizusaki, Masatoshi Imada

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46 Citations (Scopus)

Abstract

We present a quantum-number projection technique which enables us to exactly treat spin, momentum, and other symmetries embedded in the Hubbard model. By combining this projection technique, we extend the path-integral renormalization-group method to improve the efficiency of numerical computations. By taking numerical calculations for the standard Hubbard model and the Hubbard model with next-nearest-neighbor transfer, we show that the present extended method can extremely enhance numerical accuracy and that it can handle excited states, in addition to the ground state.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume69
Issue number12
DOIs
Publication statusPublished - 2004 Mar 23

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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