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- W4360610498 abstract "In trapped-ion quantum computers, two-qubit entangling gates are generated by applying spin-dependent force which uses phonons to mediate interaction between the internal states of the ions. To maintain high-fidelity two-qubit gates under fluctuating experimental parameters, robust pulse-design methods are applied to remove the residual spin-motion entanglement in the presence of motional mode-frequency drifts. Here we propose an improved pulse-design method that also guarantees the robustness of the two-qubit rotation angle against uniform mode-frequency drifts by concatenating pulses with opposite sensitivity of the angle to mode-frequency drifts. We experimentally verify significantly improved robustness of the rotation angle against uniform mode-frequency drifts, as well as observe an improvement in gate fidelity from 97.84(10)% to 98.11(11)%, compared to a single frequency-modulated pulse." @default.
- W4360610498 created "2023-03-24" @default.
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- W4360610498 date "2023-03-23" @default.
- W4360610498 modified "2023-10-18" @default.
- W4360610498 title "Angle-robust two-qubit gates in a linear ion crystal" @default.
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- W4360610498 doi "https://doi.org/10.1103/physreva.107.032617" @default.
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