Phase transitions in generalized chiral or Stiefel's models
D. Loison
Abstract
We study the phase transition in generalized chiral or Stiefel's models using Monte Carlo simulations. These models are characterized by a breakdown of symmetry O(N)/O(N-P). We show that the phase transition is clearly first order for N >= 3 when P=N and P=N-1, contrary to predictions based on the Renormalization Group in 4-εexpansion but in agreement with a recent non perturbative Renormalization Group approach.
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