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Symmetries of an Extended Hubbard Model | | Bianca L. Cerchiai
; Peter Schupp
; | | Date: |
20 May 1996 | | Subject: | Condensed Matter; Quantum Algebra | cond-mat hep-th math.QA q-alg | | Abstract: | An extended Hubbard model with phonons is considered on a D-dimensional lattice. The symmetries of the model are studied in various cases. It is shown that for a certain choice of the parameters a superconducting SU_q(2) holds as a true quantum symmetry - but only for D=1. In a natural basis the symmetry requires vanishing local phonon coupling; a quantum symmetric Hubbard model without phonons can then be obtained by a mean field approximation. | | Source: | arXiv, cond-mat/9605121 | | Services: | Forum | Review | PDF | Favorites | |
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