Simplified Calculation of Boundary S Matrices
نویسندگان
چکیده
The antiferromagnetic Heisenberg spin chain with N spins has a sector with N = odd, in which the number of excitations is odd. In particular, there is a state with a single one-particle excitation. We exploit this fact to give a simplified derivation of the boundary S matrix for the open antiferromagnetic spin-12 Heisenberg spin chain with diagonal boundary magnetic fields.
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