BibTeX Source

@Article{PhysRevA.83.032315,
  title =        "Precision requirements for spin-echo-based quantum memories",
  author =       "Khabat Heshami and Nicolas Sangouard and Jiří Minář and Hugues de Riedmatten
                 and Christoph Simon",
  journal =      "Phys. Rev. A",
  volume =       "83",
  number =       "3",
  pages =        "032315",
  numpages =     "9",
  year =         "2011",
  month =        mar,
  doi =          "10.1103/PhysRevA.83.032315",
  publisher =    "American Physical Society",
  abstract =     "Spin-echo techniques are essential for achieving long coherence times in
                 solid-state quantum memories for light because of inhomogeneous broadening of the
                 spin transitions. It has been suggested that unrealistic levels of precision for
                 the radio-frequency control pulses would be necessary for successful decoherence
                 control at the quantum level. Here we study the effects of pulse imperfections in
                 detail, using both a semiclassical and a fully quantum-mechanical approach. Our
                 results show that high efficiencies and low noise-to-signal ratios can be achieved
                 for the quantum memories in the single-photon regime for realistic levels of
                 control pulse precision. We also analyze errors due to imperfect initial-state
                 preparation (optical pumping), showing that they are likely to be more important
                 than control pulse errors in many practical circumstances. These results are
                 crucial for future developments of solid-state quantum memories.",
}