Symmetries of an extended Hubbard Model
Volume 40 / 1997
Banach Center Publications 40 (1997), 361-368
DOI: 10.4064/-40-1-361-368
Abstract
The Hamiltonian for an extended Hubbard model with phonons as introduced by A. Montorsi and M. Rasetti 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.
