Exact Solution for Perk-Schultz Model with Boundary Impurities

The Perk-Schultz model with SU_q(m\n) spin boundary impurities is constructed by dressing the c-number reflecting K matrix with local L-matrix which acts non-trivially on an impurity Hilbert space. The eigenvalue of the transfer matrix and the corresponding Bethe ansatz equations with different c-number reflecting K-matrices are obtained by using the nested Bethe ansatz method (m ≠ n). When m=1,n=2, our results come back to that of super-symmetric t-J model with SU_q(1\2) spin boundary impurities.