Abstract
We demonstrate laser-driven two-qubit and single-qubit logic gates with respective fidelities 99.9(1)% and 99.9934(3)%, significantly above the minimum threshold level required for fault-tolerant quantum computation, using qubits stored in hyperfine ground states of calcium-43 ions held in a room-temperature trap. We study the speed-fidelity trade-off for the two-qubit gate, for gate times between and , and develop a theoretical error model which is consistent with the data and which allows us to identify the principal technical sources of infidelity.
- Received 30 December 2015
DOI:https://doi.org/10.1103/PhysRevLett.117.060504
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