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

Boschi, C. Degli Esposti; Ercolessi, E.; Morandi, G.

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

Authors: C. Degli Esposti Boschi
E. Ercolessi
G. Morandi
Publication date: 29 September 2003
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Abstract

We review here some general properties of antiferromagnetic Heisenberg spin chains, emphasizing and discussing the role of hidden symmetries in the classification of the various phases of the models. We present also some recent results that have been obtained with a combined use of Conformal Field Theory and of numerical Density Matrix Renormalization Group techniques.Comment: To be published in the proceedings of the XIII Conference on "Symmetries in Physics", held in Bregenz (Voralberg, Austria), 21-24/7/2003. Plain LaTeX2e, 4 EPS figure

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