Verify Wicks theorem explicitly for the case of four operators, namely two creation operators and two destruction
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Verify Wick’s theorem explicitly for the case of four operators, namely two creation operators and two destruction operators for bosons in the same state k(vector). There are 4! = 24 possible time orderings, but just pick two possible orderings to verify.
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Let the four operators be A B Ct3 and D with the condition t t2 t3 t4 Then the timeorde...View the full answer
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