Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 7: Superconductivity & Solids At Low Temperature - Poster Session
TT 7.27: Poster
Montag, 27. März 2006, 14:00–17:45, P1
Enhancement of pairing due to the presence of resonant cavities — •K. Morawetz1,2, B. Schmidt1, M. Schreiber1, and P. Lipavsky3 — 1Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany — 2Max-Planck-Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany — 3Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116 Prague 2
A correlated fermion system is considered surrounding a finite cavity with virtual levels. The pairing properties are calculated and the influence of the cavity is demonstrated. To this end the Gell-Mann and Goldberger formula is generalized to many-body systems. We find a possible enhancement of pairing temperature if the Fermi momentum times the cavity radius fulfills a certain resonance condition which suggests an experimental realization.
[1] K. Morawetz, M. Schreiber, B. Schmidt, P. Lipavský, Enhancement of pairing due to the presence of resonant cavities, Phys. Rev. B 72 (2005) 174504-1-5
[2] K. Morawetz, M. Schreiber, B. Schmidt, A. Ficker, P. Lipavský, Correlated two-particle scattering on finite cavities, Phys. Rev. B 72 (2004) 014301-1-15