Quantum symmetry of Hubbard model unraveled
نویسندگان
چکیده
منابع مشابه
Hubbard Models with Superconducting Quantum Symmetry
where a†iσ , aiσ are fermionic operators for electrons of spin σ ∈ {↑, ↓} at site i of the lattice, niσ ≡ a † iσaiσ, and 〈i, j〉 denotes nearest neighbor sites i 6= j. The model is given in grand canonical form; μ fixes the average number 〈 ∑ i,σ niσ〉 of electrons. The first term is a local on-site interaction; for u > 0 it describes a repulsive Coulomb interaction, for u < 0 it yields an effect...
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ژورنال
عنوان ژورنال: Physics Letters A
سال: 1997
ISSN: 0375-9601
DOI: 10.1016/s0375-9601(97)00170-9