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The Faddeev Random Phase Approximation is a Greenʼs function technique that makes use of Faddeev-equations to couple two-particle–one-hole and two-hole–one-particle excitations to the single-particle spectrum. Solving these equations implies an infinite partial summation of the perturbation expansion of the self energy. This method goes beyond the third-order Algebraic Diagrammatic Approximation by...
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