2009/07/10 by J. P. Home, D. Hanneke, J. D. Jost +3 · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1126/science.1177077
published as Science 325, 1227 (2009) · 9 pages, 4 figures. Accepted to Science, and thus subject to a press embargo
arxiv created 2009/07/10 · arxiv updated 2009/12/01
Large-scale quantum information processors must be able to transport and maintain quantum information, and repeatedly perform logical operations. Here we demonstrate a combination of all the fundamental elements required to perform scalable quantum computing using qubits stored in the internal states of trapped atomic ions. We quantify the repeatability of a multi-qubit operation, observing no loss of performance despite qubit transport over macroscopic distances. Key to these results is the use of different pairs of beryllium ion hyperfine states for robust qubit storage, readout and gates, and simultaneous trapping of magnesium re-cooling ions along with the qubit ions.