A new approach to the two-dimensional σ-model with a topological charge
classification
✦ hep-lat
cond-mat.stat-mechhep-th
keywords
allowapproachcharacterchargecommenteddecompositiondiscusseddual
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Based on character decomposition, a dual transformation is introduced leading to two formulations of the theory which should allow for a removal/softening of the sign problem in the original version. Very preliminar numerical results are commented and remaining problems discussed.
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