Non-diagonal reflection for the non-critical XXZ model
Abstract
Description
The most general physical boundary $S$-matrix for the open XXZ spin chain in the non-critical regime ($\cosh (η)>1$) is derived starting from the bare Bethe ansazt equations. The boundary $S$-matrix as expected is expressed in terms of $Γ_q$-functions. In the isotropic limit corresponding results for the open XXX chain are also reproduced.
8 pages Latex
8 pages Latex