Particle–Hole Ladders

Holger Fehske, Georg Hager, Gerhard Wellein +1 more

Kisaburo Deguchi

It is shown that a ladder vertex function can be related with an approximate particle–particle (or hole–hole) Green’s function in the same way as a screened potential is represented by a hole–particle Green’s function. Then, a screened potential and a ladder vertex function are constructed of solutions of the RPA and the PVA equation, respectivly, and using the ’’static’’ forms of these, we propose the coupled scheme of the RPA and the PVA.

Richard R. Chasman, John W. Durso

D. Arnaudon, A. Sedrakyan, Tigran Sedrakyan

Joel Feldman, Horst Knörrer, Eugene Trubowitz B

A self contained analysis demonstrates that the sum of all particle-hole ladder contributions for a two dimensional, weakly coupled fermion gas with a strictly convex Fermi curve at temperature zero is bounded. This is used in our construction of two dimensional Fermi liquids.