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Problem 1: Green’s Functions The one-particle time-ordered Green’s function of a many-body system is defined as Gαβ (t, x; t′ , x′ ) = −i ⟨T ψα (t, x)ψβ† (t′ , x′ )⟩ . (1) The particle density c
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Document Date: 2015-03-23 03:13:44
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Problem 1: Green’s Functions The one-particle time-ordered Green’s function of a many-body system is defined as Gαβ (t, x; t′ , x′ ) = −i ⟨T ψα (t, x)ψβ† (t′ , x′ )⟩ . (1) The particle density c