Boundary S matrices for the open Hubbard chain with boundary fields
arXiv:cond-mat/9701002 · doi:10.1088/0305-4470/30/8/008
Abstract
Using the method introduced by Grisaru et al., boundary S matrices for the physical excitations of the open Hubbard chain with boundary fields are studied. In contrast to the open supersymmetric t-J model, the boundary S matrix for the charge excitations depend on the boundary fields though the boundary fields do not break the spin-SU(2) symmetry.
Latex,12 pages