text: modiﬁed MFLI models. It is interesting that this holds 
  despite the fact that for large λ CB model displays the 
  physics one apparently needs to reverse the sign of ∆WK 
  – the absence of the quasiparticle peak in the NS and its 
  emergence in the SCS accompanied by the dip and the 
  hump at larger energies. The absence of coherent quasi- 
  particle in the NS at large λ is also apparent form Fig 
  21 where we show the normal state distribution functions 
  for two diﬀerent λ. For large λ the jump (which indicates 
  the presence of quasiparticles) virtually disappears. 
  
  consistent with earlier calculation of the kinetic energy 
  for Ornstein-Zernike form of the spin susceptibility43. 
  
  We clearly see that the increase of the zero crossing 
  frequency of ∆W (ωc) at a truly strong coupling is cor- 
  related with the non-BCS behavior of δKE. At the same 
  time, the behavior of δW (ωc) is obviously not driven by 
  the kinetic energy as eventually δW (ωc) changes sign and 
  become negative. Rather, the increase in the frequency 
  range where ∆W (ωc) remains positive and non-BCS be- 
  havior of δKE are two indications of the same eﬀect that 
  fermions are incoherent in the NS but acquire coherence 
  in the SCS. 