Relation between quenched and annealed random ferromagnetic systems

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A sufficient condition for the average of the product of two functions of many variables to be larger than the product of their averages is obtained. The theorem is used to show that the spin-spin correlation function in a ferromagnetic quenched Ising system is bound from above by the same correlation in the corresponding annealed system. Possible extension of this result to a much wider class of models is discussed.

Original languageEnglish
Pages (from-to)37-40
Number of pages4
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number1
StatePublished - 11 Jun 1979


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