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    Low-Dimensional Spin Systems: Hidden Symmetries, Conformal Field Theories and Numerical Checks

    We review here some general properties of antiferromagnetic Heisenberg spin chains, emphasizing and discussing the rôle of hidden symmetries in the classification of the various phases of the models. We presen...

    C. Degli Esposti Boschi, E. Ercolessi, G. Morandi in Symmetries in Science XI (2005)