Physics – Mathematical Physics
Scientific paper
2000-01-20
Physics
Mathematical Physics
35 pages LaTeX, 4 postscript figures
Scientific paper
We prove a perturbative inversion theorem for the map between the interacting and the noninteracting Fermi surface for a class of many fermion systems with strictly convex Fermi surfaces and short-range interactions between the fermions. This theorem gives a physical meaning to the counterterm function K that we use in the renormalization of these models: K can be identified as that part of the self--energy that causes the deformation of the Fermi surface when the interaction is turned on.
Feldman Jon
Salmhofer Manfred
Trubowitz Eugene
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