Direct Calculation of the Boundary Matrix for the Open Heisenberg Chain
arXiv:hep-th/9407089 · doi:10.1088/0305-4470/28/4/025
Abstract
We calculate the boundary matrix for the open antiferromagnetic spin isotropic Heisenberg chain with boundary magnetic fields. Our approach, which starts from the model's Bethe Ansatz solution, is an extension of the Korepin-Andrei-Destri method. Our result agrees with the boundary matrix for the boundary sine-Gordon model with and with ``fixed'' boundary conditions.
29 pages, plain TEX, UMTG-177
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