Quantum State Engineering using Single Nuclear Spin Qubit of Optically Manipulated Ytterbium Atom

Details Quantum State Engineering using Single Nuclear Spin Qubit of Optically Manipulated Ytterbium Atom Quantum State Engineering using Single Nuclear Spin Qubit of Optically Manipulated Ytterbium Atom

2010-05-20

arxiv.org/abs/1005.3584v5

Physics

Quantum Physics

4 figures

Scientific paper

A single Yb atom is loaded into a high-finesse optical cavity with a moving lattice, and its nuclear spin state is manipulated using a nuclear magnetic resonance technique. A highly reliable quantum state control with fidelity and purity greater than 0.98 and 0.96, respectively, is confirmed by the full quantum state tomography; a projective measurement with high speed (500us) and high efficiency (0.98) is accomplished using the cavity QED technique. Because a hyperfine coupling is induced only when the projective measurement is operational, the long coherence times (T_1 = 0.49 s and T_2 = 0.10 s) are maintained. Our technique can be applied for implementing a scalable one-way quantum computation with a cluster state in an optical lattice.

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