Non-diagonal reflection for the non-critical XXZ model

Abstract

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.

8 pages Latex

References in corpus (1)

• A note on the boundary spin $s$ XXZ chain