Single-shot correlations and two-qubit gate of solid-state spins.

@article{Nowack2011SingleshotCA,
  title={Single-shot correlations and two-qubit gate of solid-state spins.},
  author={Katja C. Nowack and Mohd Wira Mohd Shafiei and Marc Laforest and Guenevere E. D. K. Prawiroatmodjo and Lars R Schreiber and Ch. Reichl and W. Wegscheider and Lieven M. K. Vandersypen},
  journal={Science},
  year={2011},
  volume={333 6047},
  pages={
          1269-72
        }
}
Measurement of coupled quantum systems plays a central role in quantum information processing. We have realized independent single-shot read-out of two electron spins in a double quantum dot. The read-out method is all-electrical, cross-talk between the two measurements is negligible, and read-out fidelities are ~86% on average. This allows us to directly probe the anticorrelations between two spins prepared in a singlet state and to demonstrate the operation of the two-qubit exchange gate on a… CONTINUE READING

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