Question: Show that the commutation relation for the electron spatial field operators is using the normalization relation for the Bloch cell functions {G), (Gr')} = 8&r

Show that the commutation relation for the electron spatial field operators is{G), (Gr')} = 8&r 7')n,n', - n (4.6.6)

using the normalization relation for the Bloch cell functions

{G), (Gr')} = 8&r 7')n,n', - n (4.6.6)

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