A Diagrammer's Note on Superconducting Fluctuation Transport for Beginners: Supplement. Jonson-Mahan Transmutation
Abstract
The Ward identity for the heat current vertex is illustrated in terms of Feynman diagrams. The Jonson-Mahan transmutation, the way how the kinetic energy at the heat current vertex for the free propagator is transmuted into the frequency for the full propagator, is the key of the illustration.
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