Discrete non-Abelian groups and asymptotically free models
classification
✦ hep-lat
keywords
modeldiscretesigmaargueargumentasymptoticallyconfirmedconsider
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We consider a two-dimensional $\sigma$-model with discrete icosahedral/dodecahedral symmetry. Using the perturbative renormalization group, we argue that this model has a different continuum limit with respect to the O(3) $\sigma$ model. Such an argument is confirmed by a high-precision numerical simulation.
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