Large-n critical behavior of O(n)\(\times{}\)O(m) spin models

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Publication:5938576

DOI10.1016/S0550-3213(01)00223-1zbMATH Open0969.82506arXivhep-th/0104024OpenAlexW1974305469MaRDI QIDQ5938576

Author name not available (Why is that?)

Publication date: 22 July 2001

Published in: (Search for Journal in Brave)

Abstract: We consider the Landau-Ginzburg-Wilson Hamiltonian with O(n)x O(m) symmetry and compute the critical exponents at all fixed points to O(n^{-2}) and to O(epsilon^3) in a epsilon=4-d expansion. We also consider the corresponding non-linear sigma model and determine the fixed points and the critical exponents to O( ilde{epsilon}^2) in the ilde{epsilon}=d-2 expansion. Using these results, we draw quite general conclusions on the fixed-point structure of models with O(n)xO(m) symmetry for n large and all 2 < d < 4.


Full work available at URL: https://arxiv.org/abs/hep-th/0104024



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