Integrability test for spin chains
نویسندگان
چکیده
We examine a simple heuristic test of integrability for quantum chains. This test is applied to a variety of systems, including a generic isotropic spin-1 model with nearestneighbor interactions and a multiparameter family of spin-1/2 models generalizing the XYZ chain, with next-to-nearest neighbor interactions and bond alternation. Within the latter family we determine all the integrable models with an o(2) symmetry. PACS numbers: 75.10.Jm, 11.10.Lm, 11.30.-j. Work supported by NSERC (Canada).
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