Abstract
J.Stat.Mech.0508:P08002,2005 We propose a generalization of the Baxter T-Q relation which involves more
than one independent Q(u). We argue that the eigenvalues of the transfer matrix
of the open XXZ quantum spin chain are given by such generalized T-Q relations,
for the case that at most two of the boundary parameters {\alpha_-, \alpha_+,
\beta_-, \beta_+} are nonzero, and the bulk anisotropy parameter has values
\eta = i \pi/2, i\pi/4, ...
