Exact realization of SO(5) symmetry in extended Hubbard models

Details Exact realization of SO(5) symmetry in extended Hubbard models Exact realization of SO(5) symmetry in extended Hubbard models

1997-07-28

arxiv.org/abs/cond-mat/9707275v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, LaTeX; no figures; submitted, Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.80.3590

Zhang recently conjectured an approximate SO(5) symmetry relating
antiferromagnetic and superconducting states in high-T_c cuprates. Here, an
exact SO(5) symmetry is implemented in a generalized Hubbard model (with
long-range interactions) on a lattice. The possible relation to a more
realistic extended Hubbard Hamiltonian is discussed.

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