Simplified Calculation of Boundary S Matrices

Details Simplified Calculation of Boundary S Matrices Simplified Calculation of Boundary S Matrices

1997-05-23

arxiv.org/abs/hep-th/9705187v1

J.Phys.A30:L507-L512,1997

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, LaTeX, no figures

Scientific paper

10.1088/0305-4470/30/15/005

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-1/2 Heisenberg spin chain with diagonal boundary magnetic fields.

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