We show that the transfer matrix of the A(1)N - 1 open spin chain with diagonal boundary fields has the symmetry Uq(SU(l)) × Uq(SU(N - l)) × U(1), as well as a "duality" symmetry which maps l ↔ N - l. We exploit these symmetries to compute exact boundary S-matrices in the regime with q real.
- Bethe ansatz
- Boundary S-matrix
- Boundary Yang-Baxter equation
- Integrable spin chain
- Quantum group
ASJC Scopus subject areas
- Nuclear and High Energy Physics