Manipulation and detection of a trapped Yb+ hyperfine qubit

  title={Manipulation and detection of a trapped Yb+ hyperfine qubit},
  author={Steven Matthew Olmschenk and Kelly Cooper Younge and David L. Moehring and Dzmitry Matsukevich and Peter Maunz and Christopher R. Monroe},
  journal={Physical Review A},
We demonstrate the use of trapped ytterbium ions as quantum bits for quantum information processing. We implement fast, efficient state preparation and state detection of the first-order magnetic field-insensitive hyperfine levels of $^{171}\mathrm{Yb}^{+}$, with a measured coherence time of $2.5\phantom{\rule{0.3em}{0ex}}\mathrm{s}$. The high efficiency and high fidelity of these operations is accomplished through the stabilization and frequency modulation of relevant laser sources. 

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