2016/03/31 by J. P. Gaebler, T. R. Tan, Y. Lin +8 · 2 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physrevlett.117.060505
published as Phys. Rev. Lett. 117, 060505 (2016) · 12 pages, 7 figures
arxiv created 2016/03/31 · arxiv updated 2016/08/10
We report high-fidelity laser-beam-induced quantum logic gates on magnetic-field-insensitive qubits comprised of hyperfine states in 9Be+ ions with a memory coherence time of more than 1 s. We demonstrate single-qubit gates with error per gate of 3.8(1)× 10-5. By creating a Bell state with a deterministic two-qubit gate, we deduce a gate error of 8(4)×10-4. We characterize the errors in our implementation and discuss methods to further reduce imperfections towards values that are compatible with fault-tolerant processing at realistic overhead.