TY - JOUR
T1 - Quantum-number projection in the path-integral renormalization group method
AU - Mizusaki, Takahiro
AU - Imada, Masatoshi
PY - 2004/3/23
Y1 - 2004/3/23
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.69.125110
DO - 10.1103/PhysRevB.69.125110
M3 - Article
AN - SCOPUS:2342426912
VL - 69
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 12
ER -