Regular Article - Theoretical Physics
Effect of the quartic gradient terms on the critical exponents of the Wilson-Fisher fixed point in O(N) models
Department of Theoretical Physics, University of Debrecen, P.O. Box 5, H-4010, Debrecen, Hungary
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Accepted: 14 September 2017
Published online: 19 February 2018
The effect of the terms of the gradient expansion on the anomalous dimension and the correlation length’s critical exponent of the Wilson-Fisher fixed point has been determined for the Euclidean 3-dimensional O(N) models with . Wetterich’s effective average action renormalization group method is used with field-independent derivative couplings and Litim’s optimized regulator. It is shown that the critical theory is well approximated by the effective average action preserving O(N) symmetry with an accuracy of .
© SIF, Springer-Verlag GmbH Germany, part of Springer Nature, 2018