Laser Cooling of Trapped Fermi Gases deeply below the Fermi Temperature
  We study the collective Raman cooling of a polarized trapped Fermi gas in the Festina Lente regime, when the heating effects associated with photon reabsorptions are suppressed. We predict that by adjusting the spontaneous Raman emission rates and using appropriately designed anharmonic traps, temperatures of the order of 2.7% of the Fermi temperature can be achieved in 3D. 
Z. Idziaszek, L. Santos and M. Lewenstein