Symmetries of an extended Hubbard Model

Volume 40 / 1997

Bianca Cerchiai, Peter Schupp Banach Center Publications 40 (1997), 361-368 DOI: 10.4064/-40-1-361-368


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.


  • Bianca Cerchiai
  • Peter Schupp

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