Question: Verify Wicks theorem explicitly for two fermion operators acting on the same state k(vector). Show also that bk(t1)b}{(12) = b}(t2)bk(tr). (8.6.17)

Verify Wick’s theorem explicitly for two fermion operators acting on the same state k(vector). Show also thatbk(t1)b}{(12) = b}(t2)bk(tr). (8.6.17)

bk(t1)b}{(12) = b}(t2)bk(tr). (8.6.17)

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