Generic boundary scattering in the open XXZ chain
arXiv:0711.0716 · doi:10.1016/j.physleta.2008.03.056
Abstract
The open critical XXZ spin chain with a general right boundary and a trivial diagonal left boundary is considered. Within this framework we propose a simple computation of the exact generic boundary S-matrix (with diagonal and non-diagonal entries), starting from the `bare' Bethe ansatz equations. Our results coincide with the ones obtained by Ghoshal and Zamolodchikov, after assuming suitable identifications of the bulk and boundary parameters.
14 pages, Latex. Added comments and references. To appear in PLA
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