3D Projection Sideband Cooling
  We demonstrate 3D microwave projection sideband cooling of trapped, neutral atoms. The technique employs state-dependent potentials that enable microwave photons to drive vibration-number reducing transitions. The particular cooling sequence we employ uses minimal spontaneous emission, and works even for relatively weakly bound atoms. We cool 76% of atoms to their 3D vibrational ground states in a site-resolvable 3D optical lattice. 
Xiao Li and Theodore A. Corcovilos and Yang Wang and David S. Weiss
cond-mat.quant-gas physics.atom-ph