A branch point in the critical surface of the Ashkin-Teller model in the renormalization group theory
Journal of Physics A Mathematical and GeneralPublished 1 September 1975
H. J. F. Knops
Citations44
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Abstract
It is shown that a branch point appears in the critical surface of the Ashkin-Teller model at the point where this model reduces to a Potts model, and its relation with the eight-vertex model is discussed. An estimate for the critical exponent alpha of the Potts model is given.
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