Fast Quantum State Control of a Single Trapped Neutral Atom
  We demonstrate the initialisation, read-out and high-speed manipulation of a qubit stored in a single 87 Rb atom trapped in a submicron-size optical tweezer. Single qubit rotations are performed on a sub-100 ns time scale using two-photon Raman transitions. Using the ``spin-echo'' technique, we measure an irreversible dephasing time of 34 ms. The read-out of the single atom qubit is at the quantum projection noise limit when averaging up to 1000 individual events. 
Matthew P. A. Jones (LCFIO), Jerome Beugnon (LCFIO), Alpha Ga\"etan   (LCFIO), Junxiang Zhang (LCFIO), Gaetan Messin (LCFIO)...