Transfer of trapped atoms between two optical tweezer potentials
  Trapped, laser-cooled rubidium atoms are transferred between two strongly focused, horizontal, orthogonally intersecting laser beams. The transfer efficiency is studied as a function of the vertical distance between the beam axes. Optimum transfer is found when the distance equals the beam waist radius. Numerical simulations reproduce well the experimental results. 
Matthias Schulz, Herbert Crepaz, Ferdinand Schmidt-Kaler, Juergen   Eschner, Rainer Blatt