1. Symplectic symmetry of Hubbard model and η pairing
- Author
-
Z. S. Li, B. F. Li, and C. C. Sun
- Subjects
Symplectic group ,Hubbard model ,Quantum mechanics ,Pairing ,Statistical and Nonlinear Physics ,Multiplicity (mathematics) ,Symmetry group ,Mathematical Physics ,Basis set ,Eigenvalues and eigenvectors ,Mathematics ,Symplectic geometry - Abstract
By means of symplectic group Sp(2M), the symplectic symmetry of the Hubbard model and the η pairing are investigated to approach the eigenstates which have the largest spin multiplicities. The behavior of the off‐diagonal long‐range order of these eigenstates is examined by the criterion proposed by Yang and the energy diagram of the corresponding eigenvalues is elucidated by the η pairing mechanism. A basis set which is expressible in terms of η and ηa pairings is proposed.
- Published
- 1995