Generic boundary scattering in the open XXZ chain

Details Generic boundary scattering in the open XXZ chain Generic boundary scattering in the open XXZ chain

2007-11-05

arxiv.org/abs/0711.0716v3

Phys.Lett.A372:4144-4150,2008

Physics

Mathematical Physics

14 pages, Latex. Added comments and references. To appear in PLA

Scientific paper

10.1016/j.physleta.2008.03.056

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.

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