A theoretical condensed matter physicist who coauthored the Schrieffer-Wolff transformation with John Robert Schrieffer. Their canonical transformation relates a model with fluctuating impurity charge to an effective model of spin exchange in the weak-mixing limit. This explains how virtual charge processes can produce the low-energy physics associated with the Kondo effect.[ref]
Relation between the Anderson and Kondo Hamiltonians by John Robert Schrieffer and P. A. Wolff. Abstract: canonical transformation and equivalence in the small-mixing limit
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