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

Takahiro Mizusaki, Masatoshi Imada

研究成果: Article査読

48 被引用数 (Scopus)

抄録

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.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
69
12
DOI
出版ステータスPublished - 2004 3 23
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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