A neutral atom quantum register
  We demonstrate the realization of a quantum register using a string of single neutral atoms which are trapped in an optical dipole trap. The atoms are selectively and coherently manipulated in a magnetic field gradient using microwave radiation. Our addressing scheme operates with a high spatial resolution and qubit rotations on individual atoms are performed with 99% contrast. In a final read-out operation we analyze each individual atomic state. Finally, we have measured the coherence time and identified the predominant dephasing mechanism for our register. 
D. Schrader, I. Dotsenko, M. Khudaverdyan, Y. Miroshnychenko, A.   Rauschenbeutel and D. Meschede