<Abstract>The spectra of four-point Hubbard model with oneand two holes are given. The analytic results are com-pared with those of t-J and t-t'-J models. For one-holecase there exists a phase transition in ...<Abstract>The spectra of four-point Hubbard model with oneand two holes are given. The analytic results are com-pared with those of t-J and t-t'-J models. For one-holecase there exists a phase transition in the groundstate.The transition point is at t/U = 0. 054.展开更多
基金1Teh project supported by National Natural Science Foundation of China
文摘<Abstract>The spectra of four-point Hubbard model with oneand two holes are given. The analytic results are com-pared with those of t-J and t-t'-J models. For one-holecase there exists a phase transition in the groundstate.The transition point is at t/U = 0. 054.
