期刊論文

標題 Crossover in the attractive one-dimensional Hubbard model for general electron concentrations
學年 87
學期 1
出版(發表)日期 1999/01/01
作品名稱 Crossover in the attractive one-dimensional Hubbard model for general electron concentrations
作品名稱(其他語言)
著者 Kocharian, A. N.; Yang, C.; Chiang, Y. L.; Kioussis, N.
單位 淡江大學物理學系
出版者 Amsterdam: Elsevier BV * North-Holland
著錄名稱、卷期、頁數 Physica B: Condensed Matter 259-261, pp.739-741
摘要 The crossover and the ground-state properties in the attractive Hubbard model are studied using the exact Bethe-ansatz equations and the self-consistent field (SCF) approach with renormalized chemical potential. The exact and the SCF results for the ground-state energy, the concentration of double occupied sites D, the chemical potential μ and the kinetic energy are in good agreement for all band fillings n and a wide range of the coupling strength -U/t. The SCF theory in one dimension suggests a smooth crossover from the BCS superconductivity to the superfluidity of local pairs under variation of -U/t and n. We found a simple relationship between D, n and the BCS order parameter.
關鍵字 Attractive Hubbard model;Bethe-ansatz;Self-consistent field;Crossover
語言 英文
ISSN 0921-4526
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Yang, C
審稿制度
國別 荷蘭
公開徵稿
出版型式 紙本