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Annales Henri Poincaré

, Volume 4, Issue 1, pp 137–193 | Cite as

Low Temperature Analysis of Two-Dimensional Fermi Systems with Symmetric Fermi Surface

  • G. Benfatto
  • A. Giuliani
  • V. Mastropietro
Original article

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.

Keywords

Renormalization Group Fermi Surface Small Temperature Temperature Analysis Perturbative Expansion 

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Copyright information

© Birkhäuser Verlag Basel, 2003

Authors and Affiliations

  • G. Benfatto
    • 1
  • A. Giuliani
    • 2
  • V. Mastropietro
    • 3
  1. 1.Dipartimento di Matematica, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica, I-00133, Roma, Italy, e-mail: benfatto@mat.uniroma2.itItaly
  2. 2.Dipartimento di Fisica, Università die Roma “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Roma, Italy, e-mail: alessandro.giuliani@roma1.infn.itItaly
  3. 3.Dipartimento di Matematica, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica, I-00133, Roma, Italy, e-mail: mastropi@mat.uniroma2.itItaly

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