Fermi-liquid regime of the mesoscopic Kondo problem
  We consider the low temperature regime of the mesoscopic Kondo problem, and in particular the relevance of a Fermi-liquid description of this regime. Using two complementary approaches -- a mean field slave fermion approximation on the one hand and a Fermi-liquid description "\`a la Nozi\`eres" supplemented by an argument of separation of scale on the other hand -- we show that they both lead to (essentially) the same quasi-particle spectra, providing in this way a strong indication that they both give the correct physics of this regime. 
Denis Ullmo, Dong E. Liu, S\'ebastien Burdin and Harold U. Baranger
cond-mat.mes-hall