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Integrable Deformations of the XXZ Spin Chain

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.

preprint2013arXivOpen access
Niklas BeisertLucas FievetMarius de LeeuwFlorian Loebbert
cond-mat.stat-mechmath-phmath.MPhep-th
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Niklas BeisertLucas FievetMarius de LeeuwFlorian Loebbert

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