Rigorous eta -pairing ground state in an extended Hubbard model
Z J Wang, X M Qiu, Xingjiang Zhou
In this paper we show the existence of eta -pairing and off-diagonal long-range order (ODLRO) in the ground state of an extended Hubbard model with N up arrow -N down arrow =1, where N up arrow and N down arrow are the occupation numbers of up and down spins, for connected bipartite lattices.
Journal of Physics A Mathematical and General•Jun 21, 1995•0 citations