The open XXZ chain at $\Delta =-1/2$ and the boundary quantum Knizhnik-Zamolodchikov equations

Christian Hagendorf, Jean Liénardy

The open XXZ spin chain with the anisotropy parameter $\Delta =-\frac{1}{2}$ and diagonal boundary magnetic fields that depend on a parameter $x$ is studied. For real $x>0$, the exact finite…