Ultrafast Quantum State Control of a Single Trapped Neutral Atom

Matthew P. A. Jones (1) , Jerome Beugnon (1) , Alpha Gaëtan (2) , Junxiang Zhang (1) , Gaetan Messin (1) , Antoine Browaeys (2) , Philippe Grangier (2)

1 LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
2 Laboratoire Charles Fabry de l'Institut d'Optique / Optique quantique

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.

Domaines: Physique Quantique [quant-ph]

Matthew P. A. Jones, Jerome Beugnon, Alpha Gaëtan, Junxiang Zhang, Gaetan Messin, et al.. Ultrafast Quantum State Control of a Single Trapped Neutral Atom. 2006. ⟨hal-00096007v1⟩