H. Fan et al., PROPERTIES OF EIGENSTATES OF THE 6-VERTEX MODEL WITH TWISTED AND OPENBOUNDARY-CONDITIONS, Journal of mathematical physics, 38(7), 1997, pp. 3446-3456
We use the method proposed by Izergin and Korepin to discuss the Bethe
ansatz equations of the six-vertex model with twisted and open bounda
ry conditions. Let two parameters of the Bethe wave functions be equal
, then an additional Bethe ansatz equation arises. For the open bounda
ry condition cast, we also have discussed the dual pseudovacuum state
and have written out the simplest scalar products of the Bethe wave fu
nction. (C) 1997 American Institute of Physics.