Integrable Deformations of the XXZ Spin Chain
arXiv:1308.1584 · doi:10.1088/1742-5468/2013/09/P09028
Abstract
We consider integrable deformations of the XXZ spin chain for periodic and open boundary conditions. In particular, we classify all long-range deformations and study their impact on the spectrum. As compared to the XXX case, we have the z-spin at our disposal, which induces two additional deformations: the short-range magnetic twist and a new long-range momentum-dependent twist.
24 pages, v2: minor changes