Question: (a) What are the diagrams that you would write down in the Rayleigh Schrdinger diagrammatic method that correspond to the two terms in (11.7.5)? (b)

(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?1 1 = V + (ET) - Ep + ) - hoLo

1 1 = V + (ET) - Ep + ) - hoLo V2 CP if + 1 E('') - Ep - k) hwLo (11.7.5)

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a The diagrams for the RayleighSchrdinger approach are shown in Figure 113a The initial ... View full answer

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