Regensburg 2002 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 7: Postersitzung I: Anwendungen der Supraleitung (1-6), Dünne Schichten, Josephsonkontakte, SQUIDs (7-17), Neue und unkonv. Supraleiter(18-23), Amorphe- und Tunnelsyst. (24-28), Quantenflüssigkeiten (29-30), Syst. korr. Elektr.: Theorie I (31-45)
TT 7.38: Poster
Montag, 11. März 2002, 14:30–18:00, A
Exact correlation functions of the BCS model in the canonical ensemble — •Andreas Osterloh1,2 and Luigi Amico1,2 — 1DMFCI, Universitá di Catania, Viale A. Doria 6, I-95125 Catania, Italien — 2INFM, Unitá di Catania, Italien
We evaluate correlation functions of the BCS model for finite number of particles. The integrability of the Hamiltonian relates it with the Gaudin algebra G[sl(2)]. Therefore, a theorem that Sklyanin proved for the Gaudin model, can be applied. Several diagonal and off-diagonal correlators are calculated. The finite size scaling behavior of the pairing correlation function is studied.