Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-12-18
J.Phys.A41:194007,2008
Physics
High Energy Physics
High Energy Physics - Theory
8 pages Latex
Scientific paper
10.1088/1751-8113/41/19/194007
The most general physical boundary $S$-matrix for the open XXZ spin chain in
the non-critical regime ($\cosh (\eta)>1$) is derived starting from the bare
Bethe ansazt equations. The boundary $S$-matrix as expected is expressed in
terms of $\Gamma_q$-functions. In the isotropic limit corresponding results for
the open XXX chain are also reproduced.
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