Low Temperature Analysis of Two-Dimensional Fermi Systems with Symmetric Fermi Surface |
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| Authors: | G Benfatto A Giuliani V Mastropietro |
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| Institution: | 1.Dipartimento di Matematica, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica, I-00133, Roma, Italy, e-mail: benfatto@mat.uniroma2.it,Italy;2.Dipartimento di Fisica, Università die Roma “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Roma, Italy, e-mail: alessandro.giuliani@roma1.infn.it,Italy;3.Dipartimento di Matematica, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica, I-00133, Roma, Italy, e-mail: mastropi@mat.uniroma2.it,Italy |
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| Abstract: | 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. |
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