An SU(1|1)-Invariant S-Matrix with Dynamic Representations

Abstract

The spin chains originating from large-N conformal gauge theories are of a special kind: The Hamiltonian is not invariant under the symmetry algebra, it is rather a part of it. This leads to interesting properties within the asymptotic Bethe ansatz. Here we study an S-matrix with u(1|1) symmetry which arises in a long-range spin chain with fundamental spins of su(2|1).

10 pages, to appear in the proceedings of the 4th International Symposium On Quantum Theory And Symmetries (QTS-4), Varna Free University, Bulgaria, 15-21 August 2005, v2: references added

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