Recent content by hneder

Thanks, vanhees71, for your explanation. Your notes in the link are a bit too advanced for a junior student. Hopefully I will get there later. Is there any chance to explain in a simplified language? To be more specific, my problem arises from calculating, for example, the inner product of two...

Thanks for the reply. This is simply a product of two Green's functions, one retarded and one advanced. No, it is a regular 3D integral (summation) and momentum p and p^{\prime} here are both 3D vectors. Somehow I know there is a contour integral to be done. But it is not clear to me how should...

Homework Statement Need some help here on a frequently encountered integral in Green's function formalism. Homework Equations I have an integral/summation as a product of a retarded and advanced Green's functions, looks simply like...