Up to now, the application of the Green’s function formalism has been almost exclusively aimed at the electron gas, a system of interacting fermions. Bosons differ in their basic statistical properties, so it is not surprising that when one comes to treat them in detail, there is a quite significant change in the structure and behavior of the perturbation series.
KeywordsAnnihilation Operator Dyson Equation Boson System Plasmon Energy Screen Coulomb Interaction
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