most citedPhase-space descriptions of operators and the Wigner distribution in quantum mechanics I. A Dirac inspired view

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cond-mat.stat-mech2003

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

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

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 ph…