Consistent MFA correlation functions of Ising models for all temperatures |
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Authors: | A Bunde |
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Institution: | Institut für Theoretische Physik, Giessen, W.-Germany |
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Abstract: | A correct calculation of the Ising model correlation function C(q) = 〈(S(q) ? 〈S(q)〉) (S(-q) ? 〈S(-q)〉)〉 in the MFA results in . Previous literature supposed a violation of this sum rule to be a characteristic disadvantage of this approximation. |
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