Modified algebraic Bethe ansatz for XXZ chain on the segment – II – general cases

S. Belliard, R.A. Pimenta
2015 Nuclear Physics B  
The spectral problem of the Heisenberg XXZ spin-1/2 chain on the segment is investigated within a modified algebraic Bethe ansatz framework. We consider in this work the most general boundaries allowed by integrability. The eigenvalues and the eigenvectors are obtained. They are characterised by a set of Bethe roots with cardinality equal to N, the length of the chain, and which satisfies a set of Bethe equations with an additional term.
doi:10.1016/j.nuclphysb.2015.03.016 fatcat:wbhqbwbk4ngwrajmbyfcgcnkm4