1306.1742 (Junpeng Cao et al.)

Off-diagonal Bethe ansatz solution of the XXX spin-chain with arbitrary
boundary conditions    [PDF]

Junpeng Cao, Wenli Yang, Kangjie Shi, Yupeng Wang

With the off-diagonal Bethe ansatz method proposed recently by the present authors, we exactly diagonalize the $XXX$ spin chain with arbitrary boundary fields. By constructing a functional relation between the eigenvalues of the transfer matrix and the quantum determinant, the associated $T-Q$ relation and the Bethe ansatz equations are derived.

View original: http://arxiv.org/abs/1306.1742