(a) What are the diagrams that you would write down in the Rayleigh Schrdinger diagrammatic method that...

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(a) What are the diagrams that you would write down in the Rayleigh– Schrödinger diagrammatic method that correspond to the two terms in (11.7.5)?

(b) What are the diagrams you would write down in the Feynman method for the screening of the phonon-mediated Cooper pairing interaction?

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