We present a quantum-number projection technique and its implementation to the recently proposed path-integral renormalization group (PIRG) method, which has been quite a powerful tool in investigating strongly correlated electron systems. By this extension, the PIRG can handle excited states with different quantum numbers in addition to the ground state and precision of solution is highly improved. By taking Hubbard models as an example, we demonstrate its feasibility.
|ジャーナル||Computer Physics Communications|
|出版ステータス||Published - 2005 7月 1|
|イベント||Proceedings of the Europhysics Conference on Computational Physics 2004 CCP 2004 - |
継続期間: 2004 9月 1 → 2004 9月 4
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