Phase diagram and BCS–Bose condensation crossover in 1D and 2D Hubbard models

• Published in: Physica. C, Superconductivity Vol. 364; pp. 131 - 133
• Main Authors: Kocharian, A.N., Yang, C., Chiang, Y.L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2001
• Subjects: BCS–BC crossover; Bethe-ansatz; Hubbard model; Quantum Monte-Carlo; 71.10.Fd; BCS–BC crossover; Bethe-ansatz; Quantum Monte-Carlo; 74.20.−z; Hubbard model; 74.20.Fg

The ground-state energy, the concentration of double occupied sites and the density of bound electron pairs in low-dimensional attractive Hubbard model are calculated by means of the generalized self-consistent field (GSCF) approach. This approach gives an excellent agreement with the corresponding...