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- W4313557450 abstract "High-fidelity two-qubit gates in quantum computers are often hampered by fluctuating experimental parameters. The effects of time-varying parameter fluctuations lead to coherent noise on the qubits, which can be suppressed by designing control signals with appropriate filter functions. Here, we develop filter functions for Mo{}lmer-So{}rensen gates of trapped-ion quantum computers that accurately predict the change in gate error due to small parameter fluctuations at any frequency. We then design the filter functions of frequency-modulated laser pulses, and compare this method with pulses that are robust to static offsets of the motional-mode frequencies. Experimentally, we measure the noise spectrum of the motional modes and use it for designing the filter functions, which improves the gate fidelity from 99.23(7)% to 99.55(7)% in a five-ion chain." @default.
- W4313557450 created "2023-01-06" @default.
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- W4313557450 date "2023-01-05" @default.
- W4313557450 modified "2023-09-24" @default.
- W4313557450 title "Designing Filter Functions of Frequency-Modulated Pulses for High-Fidelity Two-Qubit Gates in Ion Chains" @default.
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- W4313557450 doi "https://doi.org/10.1103/physrevapplied.19.014014" @default.
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