High-fidelity quantum logic gates using trapped-ion hyperfine qubits
Physical Review Letters American Physical Society 117:6 (2016) 060504
Abstract:
We demonstrate laser-driven two-qubit and single-qubit logic gates with fidelities 99.9(1)% and 99.9934(3)% respectively, significantly above the ≈ 99% minimum threshold level required for faulttolerant 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 3.8 μs and 520 μs, and develop a theoretical error model which is consistent with the data and which allows us to identify the principal technical sources of infidelity.Minimally complex ion traps as modules for quantum communication and computing
(2016)
Dark-resonance Doppler cooling and high fluorescence in trapped Ca-43 ions at intermediate magnetic field
New Journal of Physics IOP Publishing 18:2 (2016) 023043
High-fidelity spatial and polarization addressing of Ca-43 qubits using near-field microwave control
(2016)
High-fidelity quantum logic gates using trapped-ion hyperfine qubits
(2015)