Comment on

• Realization of the Cirac-Zoller controlled-NOT quantum gate.

  Schmidt-Kaler F, Häffner H, Riebe M, Gulde S, Lancaster GP, Deuschle T, Becher C, Roos CF, Eschner J, Blatt R. Schmidt-Kaler F, et al. Nature. 2003 Mar 27;422(6930):408-11. doi: 10.1038/nature01494. Nature. 2003. PMID: 12660777
• Experimental demonstration of a robust, high-fidelity geometric two ion-qubit phase gate.

  Leibfried D, DeMarco B, Meyer V, Lucas D, Barrett M, Britton J, Itano WM, Jelenković B, Langer C, Rosenband T, Wineland DJ. Leibfried D, et al. Nature. 2003 Mar 27;422(6930):412-5. doi: 10.1038/nature01492. Nature. 2003. PMID: 12660778