Duality and quantum-algebra symmetry of the A (1) N−1 open spin chain with diagonal boundary fields
نویسندگان
چکیده
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.
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