Low Temperature Analysis of Two-Dimensional Fermi Systems with Symmetric Fermi Surface
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We prove the convergence of the perturbative expansion, based on Renormalization Group, of the two point Schwinger function of a system of weakly interacting fermions in d = 2, with symmetric Fermi surface and up to exponentially small temperatures, close to the expected onset of superconductivity.
KeywordsRenormalization Group Fermi Surface Small Temperature Temperature Analysis Perturbative Expansion
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