Fast Quantum State Control of a Single Trapped Neutral Atom

Matthew P. A. Jones (1) , Jérôme Beugnon (1) , Alpha Gaëtan (2) , Junxiang Zhang (1) , Gaëtan 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, Jérôme Beugnon, Alpha Gaëtan, Junxiang Zhang, Gaëtan Messin, et al.. Fast Quantum State Control of a Single Trapped Neutral Atom. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2007, 75, pp.040301(R). ⟨10.1103/PhysRevA.75.040301⟩. ⟨hal-00096007v2⟩